Bandwidth allocation method, optical line terminator, optical network unit and communication system

摘要

An object of the present invention is to increase the bandwidth use efficiency without requiring costly and fast integrated circuits or CPUs in the control unit even in a large-scale system with a large number of ONUs. An optical network unit includes an allocating unit that determines bandwidth allocation based on a predetermined allocation condition and a bandwidth transmitting unit that transmits bandwidth allocation information determined by the allocating unit to an optical line terminator. The optical line terminator is connected to a plurality of optical network units and includes a pipeline transmitting unit that transmits bandwidth allocation information transmitted from the optical network units to all optical network units to be allocated with bandwidth.