Metropolitan networks based on fiber and free space access...

Details Metropolitan networks based on fiber and free space access... Metropolitan networks based on fiber and free space access...

2006-01-03

2006-01-03

Pascal, Leslie (Department: 2633)

Optical communications

Multiplex

Optical switching

C398S054000, C398S055000, C398S056000, C398S166000

Reexamination Certificate

active

06983109

ABSTRACT:
A method for facilitating wavelength-specific and packet-switched routing comprises the steps of demultiplexing wavelengths propagating on a primary metropolitan fiber ring, determining a destination address for the wavelength, accessing a look-up table, determining if the destination address matches a local address contained in the look-up table and switching the wavelength based on a result of the determining step. A method for providing local metropolitan switching and routing and broadband local access distribution described in terms of the functions of the layers comprises the steps of interfacing with a primary fiber metropolitan ring and a local customer primary distribution/aggregation node via transport bran ches of a mesh architecture, routing specific wavelengths and newly assigned wavelengths to and from a customer's premises and handling customer specific wavelength and packet routing via one of fiber, millimeter wave radio and free space optical communications.

REFERENCES:
patent: 5600466 (1997-02-01), Tsushima et al.
patent: 5729534 (1998-03-01), Jokinen et al.
patent: 6239888 (2001-05-01), Willebrand
patent: 6252690 (2001-06-01), Laine
patent: 6754450 (2004-06-01), Chang et al.
U.S. Appl. No. 09/639,635 filed on Aug. 15, 2000.

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