|| Friday, May 18, 2007 - 4:00 pm - room ECSN 4.728 |
A Link State Advertisement Protocol for Optical Transparency Islands
Speaker: Shovan Das
Plug and play optical (PPO) nodes enable
fast, reconfigurable, and flexible ad hoc
deployment of optical networks.
Once plugged, the PPO nodes provide all-optical circuits
between client nodes to alleviate the electronic
processing bottleneck of high speed networks.
To offer these wavelength routing functionalities to
client nodes the PPO nodes must self-adjust to
possible changes of the optical physical topology
and fiber propagation characteristics.
To discover such changes the PPO nodes must make
use of a link state advertisement (LSA) protocol
that is scalable in the number of plugged PPO nodes.
This presentation describes a scalable LSA protocol
with constrained message flooding to match the
limited propagation reach of the optical signal,
i.e., the PPO node transparency island (TI).
Scalability is thus achieved naturally by limiting
the link state advertisement scope to only those
PPO nodes that need to receive the link updates.
As discussed in the presentation, the proposed protocol
appears to be a viable solution when the TI size
is relatively small, e.g., in optical networks
without signal regeneration.