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AssigneeNippon Telegraph and Telephone Corporation
InventorsHiromasa Tanobe, Akira Okada, Kazuto Noguchi, Morito Matsuoka, Takashi Sakamoto, Osamu Moriwaki
Estimating the term…
A fiber optic communication system includes a device of switching and setting wavelength of optical signals used in communication by network-node equipments, which sets the mapping of the wavelength of the optical signal used in communication by the network node equipments, and the input/output ports of an array waveguide grating (AWG), so as to construct a predetermined logical network topology by a plurality of network node equipments which are connected via optical fibers to the array waveguide grating that outputs optical signals inputted to optical input ports, to predetermined optical output ports in accordance with the wavelength thereof. As well as enabling a simple construction, it is easy to realize flexible network design, construction, and operation, and different network groups can also be easily connected to each other. Moreover, a fiber optic communication system having robust security and which can be stably operated even at the time of failure is realized at low cost.
A fiber optic communication system comprising:
A central-management-equipment that is connected to M (where M is an integer no smaller than 2, nor greater than an integer N) network-node equipments connected via optical transmission paths and configured so as to form a geometrically star-shaped physical star topology having in the center 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 a routing function that outputs to predetermined optical output ports in accordance with a wavelength of optical signals inputted to respective optical input ports,
A network-node equipment that is connected to M (M is an integer greater than or equal to 1 and less than or equal to N−1) other network-node equipments via an arrayed waveguide grating (AWG) that has N (N is an integer greater than or equal to 2) optical input ports and N optical output ports and a routing function that outputs to predetermined optical output ports in accordance with a wavelength of optical signals inputted to respective optical input ports, comprising:
Dependencies are inferred from the claim text.