| 摘要 |
PROBLEM TO BE SOLVED: To obtain a new multicast group by optical wavelength control by dynamically allocating optical wavelength to an optical subscriber's line terminal (ONU) in an optical subscriber transmission system using a wavelength multiplex system. SOLUTION: A packet 1 for multicast is received, an address multicast group 9 is analyzed and the analyzed group 9 is transmitted to a control part 8 by a packet analyzing part 2. A white noise light source 4 is driven by a packet by a light source driving circuit 3. Output of the white noise light source 4 is inputted in a variable band filter 5. The variable band filter 5 is controlled to a band for the number of wavelength of the ONU belonging to the group 9 by the control part 8 and output is inputted in an AWG 6. Output of the AWG 6 is inputted in an 8×8 optical SW 7. The SW 7 is controlled so that each wavelength is connected with a port connected with the ONU, belonging to the group 9 by the control part 8. |
