Power over Ethernet (PoE) Power Supplying Method and Apparatus

Power sourcing equipment (PSE), comprising:

• an Ethernet connector for connecting to a powered device (PD) using an Ethernet twisted pair cable, wherein the Ethernet twisted pair cable comprises a first set of cable pairs and a second set of cable pairs;
• a PSE chip for controlling power supply to the PD via the Ethernet connector;
• a memory storing program instructions;
• and
• a processor coupled to the memory and the PSE chip, and configured to execute the program instructions;
• wherein, when executing the program instructions by the processor, the PSE is configured to:
• receive a first link layer discovery protocol data unit (LLDPDU) from the PD, wherein the first LLDPDU carries a first requested power value for the first set of cable pairs and a second requested power value for the second set of cable pairs;
• and
• send a second LLDPDU to the PD, wherein the second LLDPDU carries a first allocated power value allocated by the PSE for the first set of cable pairs and a second allocated power value allocated by the PSE for the second set of cable pairs.

A power over Ethernet (PoE) system, comprising:

• a powered device (PD);
• and
• power sourcing equipment (PSE) capable of supplying power to the PD;
• wherein the PD is connected to the PSE using an Ethernet twisted pair cable, and the Ethernet twisted pair cable comprises a first set of cable pairs connected to a first PD interface of the PD and a second set of cable pairs connected to a second PD interface of the PD;
• wherein the PD is configured to:
• send a first link layer discovery protocol data (LLDPDU) to the PSE, the first LLDPDU carries a first requested power value for the first set of cable pairs and a second requested power for the second set of cable pairs;
• wherein the PSE is configured to:
• receive the first LLDPDU from the PD;
• and
• send a second LLDPDU to the PD, wherein the second LLDPDU comprises a first allocated power value allocated by the PSE for the first set of cable pairs and a second allocated power value allocated by the PSE for the second set of cable pairs.

A powered device (PD), comprising:

• an Ethernet connector configured to connect to power sourcing equipment (PSE) using an Ethernet twisted pair cable, wherein the Ethernet twisted pair cable comprises a first set of cable pairs and a second set of cable pairs;
• a first PD interface configured to connect to the first set of cable pairs via the Ethernet connector;
• a second PD interface configured to connect to the second set of cable pairs via the Ethernet connector;
• a memory storing program instructions;
• and
• a processor coupled to the memory and configured to execute the program instructions;
• wherein, when executing the program instructions by the processor, the PD is configured to:
• send a first link layer discovery protocol data unit (LLDPDU) to the PSE, wherein the first LLDPDU carries a first requested power value for the first set of cable pairs and a second requested power value for the second set of cable pairs;
• and
• receive a second LLDPDU from the PSE, wherein the second LLDPDU carries a first allocated power value allocated by the PSE for the first set of cable pairs and a second allocated power value allocated by the PSE for the second set of cable pairs.