is there any reference that i should read to understand the below image?

i know that Virtual Container Vc12 is included inside VC4 which is the largest container.

but  after mapping Vc12 inside VC4 what is the sitiuation of VC12 cross connect?

then how you created a Vc12 virutal link ?

All the image is mysterious for me.

thank you for you effort.

Picture zoom in and zoom out option can be a nice addition in this doc, please add

Please add QR code in last page of the document.

this topic is one of the greatest you have had.
Thank you Huawei Engineer for your effort.

please write the disadvantages and advantages.

bur after all, isn't this technology is going to die?
and the Ethernet will overcome it?

The Need for ASON:
In an optical network without ASON, whenever a user requires more bandwidth, there is a request for a new connection from the user to the service provider. The service provider must then manually plan and configure the route in the network. This is not only time consuming, but also wastes bandwidth if the user sparingly uses the connection. Bandwidth is increasingly becoming a precious resource and expectations from future optical networks are that they should be able to efficiently handle resources as quickly as possible. ASON fulfills some of the requirements of optical networks such as:

Fast and automatic end-to-end provisioning
Fast and efficient re-routing
Support of different clients, but optimized for IP
Dynamic set up of connections
Support of Optical Virtual Private Networks (OVPNs)
Support of different levels of quality of service
( These requirements are not restricted to optical networks and can be applied to any transport network (including SDH Networks). )

Logical Architecture of An ASON:

Logical Architecture of ASON
The logical architecture of an ASON can be divided into 3 planes:

Transport Plane
Control Plane
Management Plane
The Transport Plane contains a number of switches (optical or otherwise) responsible for transporting user data via connections. These switches are connected to each other via PI (Physical Interface).

The Control Plane is responsible for the actual resource and connection management within an ASN network. It consists of a series of OCC (Optical Connection Controllers), interconnected via NNIs (Network to Network Interfaces). These OCCs have the following functions:

Network topology discovery (resource discovery)
Signaling, routing, address assignment
Connection set-up/tear-down
Connection protection/restoration
Traffic engineering
Wavelength assignment

Optical ASON or Electrical ASON!

The debate still lingers on. When it comes to protection and re-routing on High speed links, what is the benefit of using Optical ASON versus Electrical ASON?

100GE ASON will only make sense if the lambda is 400G or above. Currently I dont see any value if the lambda is 100G right?