Patent ID: 8254783
Filing Date: 2012-08-28
Classification: H04B,H04J

Abstract:
1. A point-to-multipoint optical communication system, comprising: an optical communication system in which one station apparatus is connected to a plurality of n subscriber apparatuses (with n representing an integer of 2 or larger) via one station-side wavelength multiplexer/demultiplexer, one optical fiber transmission line, and one subscriber-side wavelength multiplexer/demultiplexer, which form an optical network; each of the one station apparatus and the plurality of (n) subscriber apparatuses configured to output an optical signal to the optical network through time division multiplexing or wavelength division multiplexing; the point-to-multipoint optical communication system having m basic configurations (with m representing an integer of 2 or larger) applied thereto, in which m station apparatuses are connected to a plurality of (n and further comprising: m subscriber-side wavelength converters that are provided, in the m basic configurations, between the plurality of (n m station-side wavelength converters that are provided, in the m basic configurations, between the m station apparatuses and the one station-side wavelength multiplexer/demultiplexer, respectively, and that convert, through the wavelength conversion, the upstream optical signal having the wavelength allocated in advance for the each of the m basic configurations, which is extracted by the one station-side wavelength multiplexer/demultiplexer, into the upstream optical signal having the first wavelength, and that convert, through the wavelength conversion, the downstream optical signal having the second wavelength into the downstream optical signal having the wavelength allocated in advance for the each of the m basic configurations, wherein transmission bursts over the one optical fiber transmission line have no correlation and have phases different from one another.