Patent ID: 8477800
Filing Date: 2013-07-02
Classification: H04Q

Abstract:
1. A passive optical network system, comprising: a master station; a plurality of slave stations; and an optical fiber network including an optical splitter and a plurality of optical fibers; wherein: said master station and said plurality of slave stations are connected to each other via said optical fiber network, said master station performing a multicast transmission of a frame signal to said plurality of slave stations via said optical fiber network, said frame signal being formed by time-division multiplexing signals which are addressed to said plurality of slave stations and received from a higher-order network, each of said plurality of slave stations receiving said frame signal and processing said signal which is addressed to said slave station of its own, said master station, including: an optical transmission interface for transmitting said signals to said plurality of slave stations at a first transfer rate or a second transfer rate which is higher than said first transfer rate; packet buffers for accumulating said signals in correspondence with each of said plurality of slave stations which are destination addresses of said signals, said signals being received from said higher-order network; and a control unit for determining transmission timings and transfer rates of said signals on the basis of an amount of said signals accumulated in said packet buffers, said signals being to be transmitted to each of said plurality of slave stations, transmitting said signals to each of said plurality of slave stations from said optical transmission interface on the basis of said transmission timings and transfer rates determined, and notifying each of said plurality of slave stations about said determined transmission timings and transfer rates; each of said plurality of slave stations, including: an optical reception interface for receiving said signals of said first transfer rate or said second transfer rate; and a control unit for controlling said optical reception interface on the basis of said transmission timings and transfer rates about which each of said plurality of slave stations is notified.