COMMUNICATION CONTROL METHOD AND STATION SIDE OPTICAL COMMUNICATION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an OLT communication control method and an OLT that can reduce the power consumption of the OLT while satisfying a traffic request band.SOLUTION: The invention is an OLT communication control method in a WDM/TDM-PON system which can switch an uplink allocation wavelength and allocation time slot according to time. The communication control method comprises, in the following order: an optical signal receiver request number calculation procedure for calculating the request number of optical signal receivers on the basis of the uplink traffic request band from ONUs; a sleeping optical signal receiver determination procedure for determining optical signal receivers which will be shifted to a sleeping state when the optical signal receiver request number is smaller than an optical signal receiver operation number; and an optical signal receiver sleeping state transition procedure for relocating an uplink allocation wavelength and allocation time slot according to the determined sleeping optical signal receivers and for shifting the optical signal receivers which do not have the uplink allocation wavelength any more to the sleeping state.