Patent ID: 7298974
Filing Date: 2007-11-20
Classification: H04J,H04L,H04Q

Abstract:
1. A fiber optic communication system comprising: an arrayed waveguide grating (AWG) that has N optical input ports (where N is an integer greater than or equal to 2) and N optical output ports, and that has a routing function that routes from an input port to an output port in accordance with a wavelength of an optical signal that has been inputted into the input port, and M (where M is an integer no smaller than 2, nor greater than an integer N) network-node equipments connected via optical transmission paths so as to form a geometrically star-shaped physical star topology having the AWG in the center, wherein said network-node equipments comprise a device of wavelength switching that switches the wavelength of said optical signals in order to dynamically change a logical network topology that indicates a geometrical form of routes of the optical signals used for transmitting/receiving data (hereunder referred to as optical signals) between network-node equipments.