Concept of WSON

 Concept of WSON:-

 Objectives:-

       During this course we are going to focus on:

Ø An introduction to WSON technology

Ø A description of the WSON Control Plane

Ø A description of the WSON Protections

On completion of this course the participants will be able to:

Ø Describe what WSON is and which its main characteristics are.

Ø Differentiate between ASON and WSON

Ø Understand how WSON works and the relevant characteristics in terms of control plane and protection schemes introduced into the WDM layer

 Introduction of WSON:-

ASON, ASTN, WSON, GMPLS, as if all these technologies were the same, it seems to be useful to clarify some points about the terminology.

The acronym GMPLS that stands for Generalized Multi-Protocol Label Switching refers to a suite of protocols developed by IETF to extend the MPLS ideas outside the context of the IP world.

The acronym ASON that stands for Automatic Switched Optical Network is Recommendation developed by ITU-T that specifies the requirement to apply the GMPLS technology to a generic optical network; in this context, with the term “generic optical network” we refer both to an SDH or WDM network, or even to OTN (ODU switching) an MPLS-TP packet network.

In the SDH domain, the specific used acronym is ASTN that stands for Automatic Switched Transport Network and, also in this case, it is a recommendation developed by ITU-T. It’s a framework that represents the ITU-T ideas about how the GMPLS technology should be applied to the SDH world (fast rerouting of Virtual Containers).

Why do we need WSON?

What are the main advantages of the WSON network compared with a traditional network?

Ø There are three main advantages:

The most important advantage is that, in WSON, new protection schemas allow advanced network resilience mechanisms that can react, in an automatic way, also in case of multiple failures.

Ø The second advantage is the possibility for WSON to realize the automatic circuit

Provisioning: as a strategic point of evolution, WSON will be able, in the future, to provide circuits on demand, allowing an IP router, for example, to

Ask for a circuit directly to the WDM node that is at the ingress of the WSON, without passing through the NMS and the human operator.

Ø The third advantage is the strategic cost reduction mainly due to the fact that it is possible to share the protection bandwidth among a group of WSON circuits