Patent ID: 8078889
Filing Date: 2011-12-13
Classification: G06F

Abstract:
1. A method of providing power from power sourcing equipment to a powered device, comprising: initializing operation of the powered device at a predetermined minimum power consumption level; sending messages at intervals to a power sourcing equipment from the powered device, the messages indicating a first power level requested of the power sourcing equipment, wherein the powered device is configured to operate at a plurality of power levels greater than the predetermined minimum power consumption level; if no messages are received from the power sourcing equipment then stop sending messages indicating a first power level to the power sourcing equipment; if a message is received from the power sourcing equipment then stop sending messages indicating a first power level to the power sourcing equipment and operating at a first new power level indicated by the message received from the power sourcing equipment; and after operating at the first new power level, sending a message to the power sourcing equipment, the message indicating a second power level requested of the power sourcing equipment, wherein the requested second power level is greater than the predetermined minimum power consumption level and different from the first power level.