Patent ID: 8249458
Filing Date: 2012-08-21
Classification: H04J,H04Q

Abstract:
1. An optical communication system having a master station connected to a plurality of slave stations via an optical fiber network provided with an optical splitter, comprising: a relay unit for relaying in said optical fiber network signals transmitted and received between said master station and said plurality of slave stations; said master station including a first controller for measuring a transmission distance or a transmission time between said master station and said relay unit; said relay unit including a second controller for measuring a transmission distance or a transmission time between said relay unit and said plurality of slave stations; wherein said master station determines, on the basis of a result of a first measurement performed by said first controller and a result of a second measurement performed by said second controller of said relay unit as well as reports from said plurality of slave stations, timings for the individual slave stations to respectively transmit signals to said master station; said second controller of said relay unit performs said second measurement in respect of one of said plurality of slave stations which is designated by said master station, and instructs slave stations other than said designated slave station to stop transmitting signals to said relay unit or said master station; and said master station receives the signals from said plurality of slave stations multiplexed through said optical fiber network.