Time driven tunable laser based switching with common time...

Details Time driven tunable laser based switching with common time... Time driven tunable laser based switching with common time...

2005-11-29

2005-11-29

Chan, Jason (Department: 2633)

Optical communications

Multiplex

Hybrid

C398S047000

Reexamination Certificate

active

06970648

ABSTRACT:
A time frame switching method and system of data units that utilize a global common time reference, which is divided into a plurality of contiguous periodic time frames. The system is designed to operate with high-speed wavelength division multiplexing (WDM) links, i.e., with multiple lambdas. The plurality of data units that are contained in each of the time frames are forwarded in a pipelined manner through the network switches, wherein at every stage of the pipeline is tuned to a new wavelength by using a tunable laser. Furthermore, the incoming wavelength of a time frame determines to which output port the data units in this time frame will be switched, while the new wavelength determines to which output the data units in this time frame will be switched in the next switch on the route. The outcome of this switching method is called tunable laser based fractional lambda switching.

REFERENCES:
patent: 5739935 (1998-04-01), Sabella
patent: 6208454 (2001-03-01), Koren et al.
A. Acampora, “A High Capacity Metropolitan Area Network Using Lightwave Transmission and Time-Multiplexed Switching”, IEEE Transactions on Communications, vol. 38, No. 10, Oct. 1990.
E. Harrington, “Synchronization Techniques for Various Switching Network Topologies”, IEEE 1978.
“Telecommunication System Engineering” by R. Freeman, John Wiley & Sons, 1980, pp. 99-103.

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