BI-DIRECTIONAL WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL SUBSCRIBER NETWORK AND METHOD FOR ALLOCATING WAVELENGTH BAND IN THE NETWORK

PROBLEM TO BE SOLVED: To provide a more economical and efficient bi-directional wavelength division multiplexing passive optical subscriber network. SOLUTION: The network includes a central office 110, a local office 120 connected with the central office 110 through a single optical transmission line 113, and subscriber devices 130 each connected with the local office 120 through a single optical transmission line 115. The central office 110 includes N first bi-directional transceiver modules 111 for providing downstream optical signals and detecting upstream optical signals, and a first multiplexer/demultiplexer 112 for multiplexing/demultiplexing upstream/downstream optical signals, the subscriber devices 130 include N second bi-directional transceiver modules 116 for providing upstream optical signals and detecting downstream optical signals, respectively, and the local office 120 includes a second multiplexer/demultiplexer 114 for multiplexing/demultiplexing upstream/downstream optical signals transmitted from the central office 110 and the subscriber devices 130. COPYRIGHT: (C)2005,JPO&NCIPI