Efficient Defragmentation Technique In Flexible Optical Networks
Tech ID: 22639 / UC Case 2012-891-0
This invention achieves a highly efficient defragmentation of spectrum in an optical telecommunications network (quasi-hitless). Using this technique, spectrum may be completely defragmented between connections in less than 400 ns, regardless of how the spectrum is allocated initially and with ho need for global synchronization.
Elastic optical networking has emerged as a promising solution for efficient spectrum utilization by allocating bandwidth networks requiring a "reset" of spectrum in order to achieve maximum efficiency. Existing techniques require either re-routing all communications along alternative routes or "push-pull" techniques of limited effectiveness.
This invention defragments spectrum with very short service disruption time (quasi-hitless) in elastic optical telecommunications networks. The technique requires that both TX and RX in the elastic transponders (EOTN) are equipped with fast tunable lasers. Complete defragmentation can be achieved in less than 400 ns. No global synchronization between TX and RX is necessary. Further, the invention allows the network to move any spectrum to a desired wavelength without any restriction from other connections lying between the original and target frequencies.
This inventions is available for world-wide licensing. Exclusive or non-exclusive license is available. Patent pending.
- Fast, automatic re-synchronization between TX and RX results with no need for global synchronization.
- Capable of moving any connection to the desired wavelength without any restriction due to other connections lying in between original and target frequencies.
Spectral defragmentation, Hitless, Elastic Optical Networks, Fast Tunable Transmitters