Optical subscriber network

摘要

An optical subscriber network for power reduction is provided. The optical subscriber network may include an Optical Line Terminal (OLT) and an Optical Network Terminal (ONT). The OLT may manage a plurality of ONTs by classifying the plurality of ONTs into a sleep group, and may multicast a sleep allowance message only to ONTs included in a predetermined sleep group.

主权项

1. An Optical Line Terminal (OLT), comprising:
a grouping unit configured to classify a plurality of Optical Network Terminals (ONTs) into a plurality of sleep groups, at least a first sleep group of which includes more than one ONT; a transmission unit configured to multicast a sleep mode allowance message to all ONTs included in the first sleep group; and a control unit configured to reclassify a first ONT in the first sleep group into a second sleep group of the plurality of sleep groups, wherein the first sleep group and the second sleep group respectively have a first sleep interval and a second sleep interval that is longer than the first sleep interval, and the control unit reclassifies the first ONT into the second sleep group when a timer for the first ONT, which is started from a point in time when the first ONT is included in the first sleep group, is terminated, the first ONT maintaining a sleep mode from the point in time when the timer is started to a point in time when the timer is terminated.