Patent ID: 8036532
Filing Date: 2011-10-11
Classification: H04J

Abstract:
1. A passive optical network system comprising an optical line terminal, an optical splitter, and a plurality of optical network units connected to the optical line terminal through an optical fiber and the optical splitter, and in which the optical line terminal and the optical network units communicate with each other by wavelength division multiplexing, wherein the optical line terminal: transmits a control message including unassigned wavelength information by a first wavelength to be received in common by the plurality of optical network units; and transmits data to each of the optical network units by second wavelengths assigned to the optical network units and being different each other and different from the first wavelength, wherein the optical network units receive the control message transmitted by the first wavelength and receive the data transmitted by second wavelength assigned to own optical network unit, and when a new optical network unit adds to the passive optical network system, the new optical network unit sets at least one second wavelength in accordance with the unassigned wavelength information included in the control message transmitted from the optical line terminal.