Reduced Guard Band for Power Over Ethernet
First Claim
1. A method of controlling a power over Ethernet system, the method comprising:
- sequentially powering a plurality of powered devices over communication cabling;
determining a first total power consumption responsive to said powering of said plurality of powered devices;
disabling, in the event that said determined first total power consumption exceeds a predetermined maximum power level, power from at least one of said powered plurality of powered devices thereby reducing power consumption to less than said predetermined maximum power level;
defining, responsive to said disabling power, a connection power limit lower than said maximum power level by a guard band;
monitoring a second total power consumption subsequent to said disabling power; and
enabling power to a powered device only in the event said monitored second total power consumption is less than said connection power limit.
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Accused Products
Abstract
A method of controlling a power over Ethernet system, the method comprising: sequentially powering a plurality of powered devices over communication cabling; determining a first total power consumption responsive to the powering of the plurality of powered devices; in the event that the determined first total power consumption exceeds a predetermined maximum power level, disabling power from at least one of the powered plurality of powered devices thereby reducing power consumption to less than the predetermined maximum power level; responsive to the disabling power, defining a connection power limit lower than the maximum power level by a guard band; monitoring a second total power consumption subsequent to the disabling power; and enabling power to a powered device only in the event the monitored second total power consumption is less than the connection power limit.
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Citations
25 Claims
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1. A method of controlling a power over Ethernet system, the method comprising:
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sequentially powering a plurality of powered devices over communication cabling; determining a first total power consumption responsive to said powering of said plurality of powered devices; disabling, in the event that said determined first total power consumption exceeds a predetermined maximum power level, power from at least one of said powered plurality of powered devices thereby reducing power consumption to less than said predetermined maximum power level; defining, responsive to said disabling power, a connection power limit lower than said maximum power level by a guard band; monitoring a second total power consumption subsequent to said disabling power; and enabling power to a powered device only in the event said monitored second total power consumption is less than said connection power limit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of controlling a power over Ethernet system, the method comprising:
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sequentially powering a plurality of powered devices over communication cabling, each of said powered plurality of powered devices being associated with a unique port; determining a total power consumption responsive to said powering of said plurality of powered devices; disabling power, in the event that said determined total power consumption exceeds a predetermined maximum power level, from one of said plurality of powered devices; defining, responsive to said disabling power, a connection power limit lower than said maximum power level by a guard band, said guard band being associated with the unique port associated with said powered device having said power disabled; monitoring total power consumption subsequent to said disabling power; and powering, in the event said monitored total power consumption subsequent to said disabling power is less than said connection power limit, said powered device having said power disabled. - View Dependent Claims (12, 13)
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14. A power over Ethernet manager, comprising:
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a power over Ethernet control circuitry; a plurality of ports, each of said ports having associated therewith one of a switch and a variable current limiter responsive to said power over Ethernet control circuitry; and at least one power sensor, in communication with said power over Ethernet control circuitry, and operative to sense an amount of power drawn via each of said plurality of ports, said power over Ethernet control circuitry being operative to; sequentially power a plurality of powered devices each connected to particular one of said plurality of ports over communication cabling; determine, via said at least one power sensor, a first total power consumption responsive to said sequentially powered plurality of powered devices; disable, in the event that said determined first total power consumption exceeds a predetermined maximum power level, via the operation of said associated one of a switch and a variable current limiter, power from at least one of said powered plurality of powered devices thereby reducing power consumption to less than said predetermined maximum power level; define, responsive to said disabled power, a connection power limit lower than said maximum power level by a guard band; monitor, via said at least one power sensor, a second total power consumption subsequent to said disabled power; and enable, via said associated one of a switch and a variable current limiter, power to a powered device only in the event said monitored second total power consumption is less than said connection power limit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A power over Ethernet manager, comprising:
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a power over Ethernet control circuitry; a plurality of ports, each of said ports having associated therewith an electronically controlled switch responsive to said power over Ethernet control circuitry; and at least one power sensor, in communication with said power over Ethernet control circuitry, and operative to sense an amount of power drawn via each of said plurality of ports, said power over Ethernet control circuitry being operative to; power a plurality of powered devices each connected to particular one of said plurality of ports over communication cabling; determine, via said at least one power sensor, a first total power consumption responsive to said powered plurality of powered devices; disable, in the event that said determined first total power consumption exceeds a predetermined maximum power level, via the operation of said associated electronically controlled switch, power from one of said powered plurality of powered devices; define, responsive to said disabled power, a connection power limit for the port associated with said disabled one of said powered device, said connection power limit being lower than said maximum power level by a guard band; monitor, via said at least one power sensor, a second total power consumption subsequent to said disabled power; and enable, via said associated electronically controlled switch, power to said disabled one of said powered devices only in the event said monitored second total power consumption is less than said connection power limit. - View Dependent Claims (24, 25)
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Specification