Classification technique for powered devices using selective frequency filtering
AssigneeCisco Technology, Inc.
InventorAnoop Vetteth
Life of this patent
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Abstract
A method, performed by a power sourcing apparatus is provided. The method includes (a) providing an electronic signal to a powered device (PD) over a wire through a circuit device, the circuit device permitting current to flow at pre-determined frequencies, the pre-determined frequencies forming a first set of frequency components, (b) sensing the electronic signal over the wire to detect frequency components present in the electronic signal, the detected frequency components forming a second set of frequency components, and (c) classifying the electronic signal into one of a plurality of classes according to a pattern of frequency components present in the first and second sets. Apparatus for use in conjunction with the method are also provided.
Claims20
A method comprising:
- providing an electronic signal to a powered device (PD) over a wire through a circuit device, the circuit device permitting current to flow at pre-determined frequencies, the pre-determined frequencies forming a first set of frequency components;
- sensing the electronic signal over the wire to detect frequency components present in the electronic signal, the detected frequency components forming a second set of frequency components;
- classifying the electronic signal into one of a plurality of classes according to a pattern of frequency components present in the first and second sets.
An apparatus comprising:
- a power supply;
- a network interface;
- and
- a controller, the controller being configured to:
- provide an electronic signal to the network interface from the power supply through a circuit device, the circuit device permitting current to flow at pre-determined frequencies, the pre-determined frequencies forming a first set of frequency components;
- sense an electronic signal passing across the network interface to detect the frequency components present in the electronic signal, the detected frequency components forming a second set of frequency components;
- classify the electronic signal into one of a plurality of classes according to a pattern of frequency components present in the first and second sets.
An apparatus comprising:
- a network interface;
- an electronic load, having a power requirement;
- a selective frequency filter, the selective frequency filter being configured to:
- receive an electronic signal from the network interface;
- filter out one or more frequencies present in the electronic signal to create a pattern of frequency components which indicates the power requirement;
- and
- provide the filtered electronic signal to the network interface.
Dependencies are inferred from the claim text.