System and method of determining standby time for mobile stations by connecting a simulator to the mobile station, measuring average current consumption, and determining actual battery capacity usage
View Patent ↗A method and system for determining standby time for a mobile station uses a battery simulator, a base station emulator, a computer to control the test equipment and MSUT for testing a mobile station. The computer includes a module for determining a radio off battery voltage, a module for deriving a battery capacity in dependence upon the radio off battery voltage, a module for measuring battery capacity usage in a predetermined time while the mobile station is in standby mode and a module for determining a standby time for the mobile station in dependence upon the battery capacity and the battery capacity usage, where the predetermined time is less than the standby time.
1. A method, comprising:
coupling a battery simulator to a mobile station, the battery simulator configured to provide the mobile station with a simulated battery voltage;
measuring, for a predetermined time period, a plurality of current measurement data points of the mobile station in standby mode;
calculating, from the plurality of current measurement data points, an average current consumption associated with the mobile station in the standby mode;
determining an actual battery capacity of a battery for the mobile station; and
determining a standby time of the mobile station based on the average current consumption and the actual battery capacity.
2. The method of claim 1 , wherein the predetermined time period is less than the standby time.
3. The method of claim 1 , wherein the average current consumption measured is an average value determined over the predetermined time period.
4. The method of claim 1 , further comprising:
determining a battery cut off voltage for the mobile station.
5. The method of claim 4 , wherein determining the actual battery capacity comprises:
deriving the actual battery capacity in dependence upon the battery cut off voltage of the mobile station.
6. The method of claim 4 , wherein the actual battery capacity is an amount of discharge from a fully charged battery to the battery cut off voltage.
7. The method of claim 6 , further comprising:
fully-charging the battery; and
determining the fully-charged voltage of the battery after being fully charged, and wherein the actual battery capacity is determined based on a difference between the fully-charged voltage and the battery cut off voltage.
8. The method of claim 4 , wherein the battery cut off voltage for the mobile station is determined by stepping down the simulated battery voltage until a radio of the mobile station turns off.
9. The method of claim 4 , wherein the determining the battery cut off voltage comprises:
adjusting the simulated battery voltage provided to the mobile station;
determining a voltage level at which a mobile station radio turns off as the battery cut off voltage.
10. A system comprising:
a battery simulator coupled to a mobile station, the battery simulator configured to provide the mobile station with a simulated battery voltage;
a computer configured to
measure, for a predetermined time period, a plurality of current measurement data points of the mobile station in standby mode;
calculate, from the plurality of current measurement data points, an average current consumption associated with the mobile station in the standby mode;
determine an actual battery capacity of a battery for the mobile station; and
determine a standby time of the mobile station based on the average current consumption and the actual battery capacity.
11. The system of claim 10 , wherein the predetermined time period is less than the standby time.
12. The system of claim 10 , wherein the average current consumption measured is an average value determined over the predetermined time period.
13. The system of claim 10 , wherein the computer is configured to determine a battery cut off voltage for the mobile station.
14. The system of claim 13 , wherein the computer is configured to derive the actual battery capacity in dependence upon the battery cut off voltage of the mobile station.
15. The system of claim 13 , wherein the actual battery capacity is an amount of discharge from a fully charged battery to the battery cut off voltage.
16. The system of claim 15 , wherein the computer is configured to determine a fully-charged voltage of the battery after being fully charged, and wherein the actual battery capacity is determined based on a difference between the fully-charged voltage and the battery cut off voltage.
17. The system of claim 13 , wherein the battery cut off voltage for the mobile station is determined by stepping down the simulated battery voltage until a radio of the mobile station turns off.
18. The system of claim 13 , wherein the computer is configured to adjust the simulated battery voltage provided to the mobile station; and determine a voltage level at which a mobile station radio turns off as the battery cut off voltage.
19. A non-transitory computer-readable medium configured with code executable by a computer to cause the computer to:
measure, for a predetermined time period, a plurality of current measurement data points of a mobile station in standby mode;
calculate, from the plurality of current measurement data points, an average current consumption associated with the mobile station in the standby mode;
determine an actual battery capacity of a battery for the mobile station; and
determine a standby time of the mobile station based on the average current consumption and the actual battery capacity,
wherein the mobile station is coupled to a battery simulator, the battery simulator configured to provide the mobile station with a simulated battery voltage.
20. The non-transitory computer-readable medium of claim 19 , wherein the predetermined time period is less than the standby time.
21. The non-transitory computer-readable medium of claim 19 , wherein the average current consumption measured is an average value determined over the predetermined time period.
22. The non-transitory computer-readable medium of claim 19 , wherein the code further causes the computer to:
determine a battery cut off voltage for the mobile station.
23. The non-transitory computer-readable medium of claim 22 , wherein the code further causes the computer to:
derive the actual battery capacity in dependence upon the battery cut off voltage of the mobile station.
24. The non-transitory computer-readable medium of claim 22 , wherein the actual battery capacity is an amount of discharge from a fully charged battery to the battery cut off voltage.
25. The non-transitory computer-readable medium of claim 24 , wherein the code further causes the computer to
determine a fully-charged voltage of the battery after being fully charged, and wherein the actual battery capacity is determined based on a difference between the fully-charged voltage and the battery cut off voltage.
26. The non-transitory computer-readable medium of claim 22 , wherein the battery cut off voltage for the mobile station is determined by stepping down the simulated battery voltage until a radio of the mobile station turns off.
27. The non-transitory computer-readable medium of claim 22 , wherein the code further causes the computer to:
adjust the simulated battery voltage provided to the mobile station;
determine a voltage level at which a mobile station radio turns off as the battery cut off voltage.