Testing and emulating a device's power characteristics

• US 7,162,377 B2
• Filed: 12/22/2003
• Issued: 01/09/2007
• Est. Priority Date: 12/22/2003
• Status: Active Grant

• Current Assignee: Keysight Technologies Singapore (Holdings) Pte. Limited. (Keysight Technologies, Inc.)
• Original Assignee: Ixia (Keysight Technologies, Inc.)
• Inventors: Schafer, Douglas, Amrod, Alan, Fornoles, Teodoro Jr.
• Primary Examiner(s): Nghiem; Michael
• Assistant Examiner(s): PRETLOW, DEMETRIUS R
• Application Number:
  US10/745,043
• Publication Number:
  US 20050135258A1
• Time in Patent Office: 1,114 Days
• Field of Search: 702/61, 702/62, 702/64, 702/65, 702/60, 706/12, 706/16, 706/20, 706/25, 703/13, 703/18, 703/19, 703/23
• US Class Current: 702/60
• CPC Class Codes: H04L 43/50 Testing arrangements

Abstract

There is disclosed methods and apparatus for testing and emulating a device'"'"'s power characteristics. Power is supplied to a device and the device'"'"'s power draw characteristics may be recorded as a script. Scripts may be stored in a library. The scripts may be replayed to draw power and emulate a device.

Claims

1. An apparatus for testing a device'"'"'s power comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power supply coupled to the network interface for providing power to the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

detecting a power request from the device,

causing the power supply to provide power to the network interface for the communications medium;

learning and capturing the device'"'"'s power characteristics;

wherein the power request identifies a class,

wherein the class corresponds to a minimum and maximum current draw selected from a group of ranges.

2. An apparatus for testing a device'"'"'s power characteristics comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power supply coupled to the network interface for providing power to the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

detecting a power request from the device,

causing the power supply to provide power to the network interface for the communications medium,

learning and capturing the device'"'"'s power characteristics;

wherein the power request identifies a mode;

wherein the network interface is for interfacing to a communications medium comprising a communications cable comprising plural pairs of wires, and the mode corresponds to providing power through an identified one of the pairs of wires.

3. An apparatus for testing a device'"'"'s power characteristics comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power supply coupled to the network interface for providing power to the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

detecting a power request from the device,

causing the power supply to provide power to the network interface for the communications medium;

learning and capturing the device'"'"'s power characteristics;

wherein the circuits and software are further for causing the power supply to create a voltage drop and detecting an expected power draw from the device.

4. An apparatus for testing a device'"'"'s power characteristics comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power supply coupled to the network interface for providing power to the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

detecting a power request from the device,

causing the power supply to provide power to the network interface for the communications medium,

learning and capturing the device'"'"'s power characteristics;

wherein the circuits and software are further for classifying the power device;

wherein the circuits and software are further for classifying comprise circuits and software for creating at least one voltage drop sufficient to power a circuit in the device and sensing classification characteristics from the device.

5. An apparatus for testing a device'"'"'s power characteristics comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power supply coupled to the network interface for providing power to the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

detecting a power request from the device,

causing the power supply to provide power to the network interface for the communications medium;

learning and capturing the device'"'"'s power characteristics;

wherein the circuits and software are further for causing the power supply to provide power to the device according to the power request;

wherein the circuits and software are further for learning and capturing the device'"'"'s power draw characteristics;

wherein the circuits and software are further for capturing the device'"'"'s power draw characteristics with reference to time.

6. The apparatus for testing a device'"'"'s power characteristics of claim 5, wherein the power characteristics include at least one of resistance, capacitance, power load, current draw, open line and short circuit.

7. The apparatus for testing a device'"'"'s power characteristics of claim 5, wherein the circuits and software are further for causing the power supply to provide power until the device signals that power is no longer needed or until power is no longer required.

8. An apparatus for testing a device'"'"'s power characteristics comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power supply coupled to the network interface for providing power to the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

detecting a power request from the device,

causing the power supply to provide power to the network interface for the communications medium;

learning and capturing the device'"'"'s power characteristics;

wherein the circuits and software are further for

storing the device'"'"'s power characteristics as a first data unit,

detecting another power request from another device,

learning and capturing the other device'"'"'s power characteristics,

storing the other device'"'"'s power characteristics as a second data unit.

9. An apparatus for testing a device'"'"'s power characteristics comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power supply coupled to the network interface for providing power to the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

detecting a power request from the device,

causing the power supply to provide power to the network interface for the communications medium;

learning and capturing the device'"'"'s power characteristics;

wherein the circuits and software are further for transmitting data to the device and receiving data from the device;

wherein the circuits and software are further for monitoring and capturing data-related events with respect to time.

10. The apparatus for testing a device'"'"'s power characteristics of claim 9, wherein the circuits and software are further for correlating the captured data-related events to the device'"'"'s power characteristics over time.

11. An apparatus for emulating a device'"'"'s power characteristics comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power consumption unit coupled to the network interface for drawing power from the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

selecting a power behavior from a library of power behaviors of devices,

loading the selected power behavior,

requesting power in accordance with the selected power behavior,

drawing power based upon the selected power behavior;

wherein the power behavior identifies a class;

wherein the class corresponds to a minimum and maximum current draw selected from a group of ranges.

12. An apparatus for emulating a device'"'"'s power characteristics comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power consumption unit coupled to the network interface for drawing power from the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

selecting a power behavior from a library of power behaviors of devices,

loading the selected power behavior,

requesting power in accordance with the selected power behavior,

drawing power based upon the selected power behavior;

wherein the power behavior includes a mode;

wherein the network interface is for interfacing to a communications medium comprising a communications cable comprising plural pairs of wires, and the mode corresponds to receiving power through an identified one of plural pairs of the wires.

13. The apparatus for emulating a device'"'"'s power characteristics of claim 12, wherein the circuits and software are further for sensing a voltage drop in a first range on the identified pair of wires and drawing current in a second range.

14. An apparatus for emulating a device'"'"'s power characteristics comprising:

a processor;

a memory;

a network interface for interfacing to a communications medium;

a power consumption unit coupled to the network interface for drawing power from the communications medium under control of the processor;

wherein the processor and the memory comprise circuits and software for

selecting a power behavior from a library of power behaviors of devices,

loading the selected power behavior,

requesting power in accordance with the selected power behavior,

drawing power based upon the selected power behavior;

wherein the power behavior specifies a length of time for drawing power.