Power management in wireless tracking device operating with restricted power source
First Claim
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1. A wireless tracking device, comprising:
- a locating device configured to determine a location of the wireless tracking device;
at least one controller coupled to the locating device, the at least one controller configured to;
determine a first estimated distance to a location of a geofence;
compute, based on the determined first distance, a first estimated time of arrival to the location of the geofence;
determine, based on the first estimated time of arrival, a first interval for switching the wireless tracking device between a first mode and a second mode;
determine a second estimated distance to the location of the geofence;
compute, based on the determined second distance, a second estimated time of arrival to the location of the geofence;
determine, based on the second estimated time of arrival, a second interval for switching the wireless tracking device between the first mode and the second mode;
determine an estimated period of time the wireless tracking device will be within the geofence; and
in response to determining that the second estimated time of arrival has elapsed, maintain the wireless tracking device in the first mode for the estimated period of time;
wherein the second mode consumes more power than the first mode.
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Abstract
A wireless tracking device operating in at least two modes to reduce power consumption and extend the operable period of the wireless tracking device. In an active mode, the wireless tracking device samples sensor signals at a higher resolution and may also actively communicate with a remote device via wireless connection. In a hibernation mode, most of the components or modules in the wireless tracking device are shut down to reduce power consumption. The wireless tracking device may switch to the active mode when a predetermine event is detected.
25 Citations
20 Claims
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1. A wireless tracking device, comprising:
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a locating device configured to determine a location of the wireless tracking device; at least one controller coupled to the locating device, the at least one controller configured to; determine a first estimated distance to a location of a geofence; compute, based on the determined first distance, a first estimated time of arrival to the location of the geofence; determine, based on the first estimated time of arrival, a first interval for switching the wireless tracking device between a first mode and a second mode; determine a second estimated distance to the location of the geofence; compute, based on the determined second distance, a second estimated time of arrival to the location of the geofence; determine, based on the second estimated time of arrival, a second interval for switching the wireless tracking device between the first mode and the second mode; determine an estimated period of time the wireless tracking device will be within the geofence; and in response to determining that the second estimated time of arrival has elapsed, maintain the wireless tracking device in the first mode for the estimated period of time; wherein the second mode consumes more power than the first mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of operating a wireless tracking device, comprising:
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determining a first estimated distance to a location of a geofence; computing, based on the determined first distance, a first estimated time of arrival to the location; determining, based on the first estimated time of arrival, a first interval for switching the wireless tracking device between a first mode and a second mode; determining a second estimated distance to the location; computing, based on the determined second distance, a second estimated time of arrival to the location; determining, based on the second estimated time of arrival, a second interval for switching the wireless tracking device between the first mode and the second mode; determining an estimated period of time the wireless tracking device will be within the geofence; and in response to determining that the second estimated time of arrival has elapsed, maintaining the wireless tracking device in the first mode for the estimated period of time; wherein the second mode consumes more power than the first mode. - View Dependent Claims (16, 17, 18)
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19. A non-transitory computer-readable storage medium structured to store instructions executable by a processor in a wireless tracking device, the instructions, when executed cause the processor to:
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determine a first estimated distance to a location of a geofence; compute, based on the determined first distance, a first estimated time of arrival to the location; determine, based on the first estimated time of arrival, a first interval for switching the wireless tracking device between a first mode and a second mode; determine a second estimated distance to the location; compute, based on the determined second distance, a second estimated time of arrival to the location; determine, based on the second estimated time of arrival, a second interval for switching the wireless tracking device between the first mode and the second mode; determine an estimated period of time the wireless tracking device will be within the geofence; and in response to determining that the second estimated time of arrival has elapsed, maintain the wireless tracking device in the first mode for the estimated period of time; wherein the second mode consumes more power than the first mode. - View Dependent Claims (20)
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Specification