Power management method and apparatus of ONU supporting slicing function

A power management method performed by a power management apparatus of an optical network unit (ONU) supporting a slicing function, the power management method comprising:

• receiving a first message for setting up a power management mode for each slice of an ONU including multiple slices from an optical line terminal (OLT);
• setting up the power management mode for each slice of the ONU based on the received first message;
• and
• transmitting a second message including a set up result of the power management mode for each slice included in the ONU to the OLT,
• wherein the power management apparatus identifies an identifier included in the first message through a slice parser to set up the power management mode for each corresponding slice.

A power management method performed by a power management apparatus of an optical line terminal (OLT) supporting a slicing function, the power management method comprising:

• broadcasting a first message for discovering a power management attribute of optical network units (ONUs) including multiple slices;
• receiving a second message including the power management attribute from each of the ONUs;
• transmitting a third message for setting up a power management parameter for each slice included in each of the ONUs;
• receiving a fourth message including a set up result of the power management parameter for each slice included in each of the ONUs;
• transmitting a fifth message for setting up a power management mode for each slice included in each of the ONUs;
• and
• receiving a sixth message including a set up result of the power management mode for each slice included in each of the ONUs.