Semantic Web for Hybrid Networks

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

Semantic Web for Hybrid Networks

Dr. Paola Grosso

SNE group

University of Amsterdam

The Netherlands

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

… 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

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

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.

Object

Subject

Predicate

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

Distributed information

Concept 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 A

NDL

Domain B

NDL

seeAlso()

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

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.

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

Network Description Language

Choice of RDF instead of XML syntax

Grounded 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"

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

Schemas

The result:

•
Topology schema

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

•
Layer schema

describes 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 schema

describes the physical aspects of network elements.

•
Plus nine
technology schemata.


Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks


UML diagram

Diagram allows easier
comparisons with other
models.

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

Topology schema

A vocabulary for defining network topology on a single layer.

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

Multi
-
layer schemas

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

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

Tools

To facilitate adoption we provide NDL creation and validation tools.

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

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

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

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

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

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.

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

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
.


Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

From network to applications

From the
physical
architecture

To the
semantic
model for the
architecture

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

Semantic Reasoning

Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

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.


Feb. 21 2008

On*Vector Workshop

Semantic Web for Hybrid Networks

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