Power Management Method and Apparatus for Power Sourcing Equipment

A method, comprising:

• determining a power overload capacity as a first difference of total power actually used when power sourcing equipment (PSE) supplies power to a plurality of powered devices (PDs) and actual available power of the PSE, wherein the total power is a sum of actual power used by a plurality of powered-on ports, and wherein the actual available power is a second difference of entire available power of the PSE and reserved power;
• determining, based on the power overload capacity and a plurality of intervals, whether to continue supplying power to the plurality of PDs;
• continuing supplying, to the plurality of PDs, the power when the power overload capacity falls into a first interval;
• and
• powering off one or more of the plurality of PDs when a first accumulated duration in which the power overload capacity falls into a second interval reaches a preset first threshold.

An apparatus, comprising:

• a memory configured to store instructions;
• and
• one or more processors coupled to the memory and configured to execute the instructions to:
• supply, to a plurality of powered devices (PDs), power;
• determine, based on a power usage status, reserved power of a power sourcing equipment (PSE), wherein the reserved power varies with the power usage status;
• and
• continue to supply, to the plurality of PDs and using the reserved power, the power when actual available power of the PSE is exhausted.