OPTICAL LINE TERMINAL DEVICE AND PON SYSTEM

摘要

An OLT includes an upper-layer processing unit 46 that receives a transmission request for notifying a data amount transmitted from an ONU and applies predetermined upper-layer processing to data received from the ONU. The OLT includes a band-allocation-information managing unit 42 that instructs, based on the transmission request, when determining that a free period, which is a period in which a band is not allocated to data transmission from the ONU, equal to or larger than a predetermined band threshold is present, the upper-layer processing unit 46 to shift a power saving state. The upper-layer processing unit 46 shifts to the power saving state based on the instruction.