Tracking device power preservation through signal strength reduction

• US 9,615,371 B1
• Filed: 08/02/2016
• Issued: 04/04/2017
• Est. Priority Date: 08/02/2016
• Status: Active Grant

• Current Assignee: TILE, INC. (Life360 Incorporated)
• Original Assignee: TILE, INC. (Life360 Incorporated)
• Inventors: de Barros Chapiewski, Guilherme
• Primary Examiner(s): Khan, Suhail
• Application Number:
  US15/226,137
• Time in Patent Office: 245 Days
• Field of Search: None
• CPC Class Codes: H04W 4/023 using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 52/0254 detecting a user operation or a tactile contact or a motion of the device
• CPC Class Codes: H04W 52/48 during retransmission after error or non-acknowledgment
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 76/19 Connection re-establishment
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The power consumption of a tracking device can be reduced by managing the transmission power of the tracking device when a mobile device is at the edge of the range of the tracking device. A connection can be established between a tracking device and a mobile device at the edge of a first range of the tracking device. The transmission range of the tracking device can be reduced to sever the connection between the tracking device and the mobile device. After a pre-determined time interval or after a connection with the mobile device is re-established the transmission range of the tracking device can be restored.

Claims

1. A method for conserving power for a tracking device, the method comprising:

establishing, by the tracking device, a communicative connection with a mobile device, the mobile device located at a periphery of a first transmission range of the tracking device;

receiving, by the tracking device from the mobile device, an instruction to reduce the transmission range of the tracking device to a second transmission range, the instruction sent in response to a determination by the mobile device that the mobile device is located at the periphery of the first transmission range of the mobile device;

reducing, by the tracking device, the transmission range of the tracking device to the second transmission range such that the communication connection between the tracking device and the mobile device is severed;

in response to re-establishing a connection with the mobile device while the transmission range of the tracking device is the second transmission range, increasing, by the tracking device, the transmission range of the tracking device to the first transmission range; and

in response to passage of a pre-determined interval of time without re-establishing a connection with the mobile device, increasing, by the tracking device, the transmission range of the tracking device to the first transmission range.

2. The method of claim 1, wherein reducing the transmission range of the tracking device comprises reducing an effective transmission power of a transmitter of the tracking device from a first transmission power to a second transmission power lower than the first transmission power.

3. The method of claim 2, wherein increasing the transmission range of the tracking device to the first transmission range comprises increasing the effective transmission power of the transmitter of the tracking device from the second transmission power to the first transmission power.

4. The method of claim 1, wherein reducing the transmission range of the tracking device comprises iteratively reducing an effective transmission power of a transmitter of the tracking device until the communication connection between the tracking device and the mobile device is severed.

5. The method of claim 1, wherein the mobile device is configured to send the instruction to reduce the transmission range in response to a signal strength of the tracking device detected by the mobile device being lower than a threshold signal strength.

6. The method of claim 1, wherein the mobile device is configured to send the instruction to reduce the transmission range in response to a number of connections established between the mobile device and the tracking device over a predetermined time period being greater than a threshold number of connections.

7. The method of claim 1, further comprising:

receiving, by the tracking device from the mobile device, a second instruction to reduce the transmission range of the tracking device to a second transmission range, the second instruction sent in response to a determination by the mobile device that the signal strength of the tracking device detected by the mobile device is greater than a threshold signal strength.

8. A non-transitory computer readable storage medium containing instructions that when executed by a processor of a tracking device cause the tracking device to perform the steps of:

establishing, by the tracking device, a communicative connection with a mobile device, the mobile device located at a periphery of a first transmission range of the tracking device;

receiving, by the tracking device from the mobile device, an instruction to reduce the transmission range of the tracking device to a second transmission range, the instruction sent in response to a determination by the mobile device that the mobile device is located at the periphery of the first transmission range of the mobile device;

reducing, by the tracking device, the transmission range of the tracking device to the second transmission range such that the communication connection between the tracking device and the mobile device is severed;

in response to re-establishing a connection with the mobile device while the transmission range of the tracking device is the second transmission range, increasing, by the tracking device, the transmission range of the tracking device to the first transmission range; and

in response to passage of a pre-determined interval of time without re-establishing a connection with the mobile device, increasing, by the tracking device, the transmission range of the tracking device to the first transmission range.

9. The computer readable medium of claim 8, wherein reducing the transmission range of the tracking device comprises reducing an effective transmission power of a transmitter of the tracking device from a first transmission power to a second transmission power lower than the first transmission power.

10. The computer readable medium of claim 9, wherein increasing the transmission range of the tracking device to the first transmission range comprises increasing the effective transmission power of the transmitter of the tracking device from the second transmission power to the first transmission power.

11. The computer readable medium of claim 8, wherein reducing the transmission range of the tracking device comprises iteratively reducing an effective transmission power of a transmitter of the tracking device until the communication connection between the tracking device and the mobile device is severed.

12. The computer readable medium of claim 8, wherein the mobile device is configured to send the instruction to reduce the transmission range in response to a signal strength of the tracking device detected at the mobile device being lower than a threshold signal strength.

13. The computer readable medium of claim 8, wherein the mobile device is configured to send the instruction to reduce the transmission range in response to a number of connections established between the mobile device and the tracking device over a predefined time period being greater than a threshold number of connections.

14. The computer readable medium of claim 8, further comprising instructions for:

receiving, by the tracking device from the mobile device, a second instruction to

reduce the transmission range of the tracking device to a second transmission range, the second instruction sent in response to a determination by the mobile device that the signal strength of the tracking device detected by the mobile device is greater than a threshold signal strength.

15. A tracking device, comprising:

a tracking device interface, the tracking device interface configured to;

establish a communicative connection with a mobile device, the mobile device located at a periphery of a first transmission range of the tracking device; and

receive, from the mobile device, an instruction to reduce the transmission range of the tracking device to a second transmission range,

the instruction sent in response to a determination by the mobile device that the mobile device is located at the periphery of the first transmission range of the mobile device; and

a tracking device controller, the tracking device controller configured to;

reduce the transmission range of the tracking device to the second transmission range such that the communication connection between the tracking device and the mobile device is severed;

in response to re-establishing a connection with the mobile device while the transmission range of the tracking device is the second transmission range, increase the transmission range of the tracking device to the first transmission range; and

in response to passage of a pre-determined interval of time without reestablishing a connection with the mobile device, increase the transmission range of the tracking device to the first transmission range.

16. The tracking device of claim 15, further comprising a transceiver and wherein reducing the transmission range of the tracking device comprises reducing an effective transmission power of the transceiver from a first transmission power to a second transmission power lower than the first transmission power.

17. The tracking device of claim 16, wherein increasing the transmission range of the tracking device to the first transmission range comprises increasing the effective transmission power of the transceiver from the second transmission power to the first transmission power.

18. The tracking device of claim 15, wherein reducing the transmission range of the tracking device comprises iteratively reducing an effective transmission power of the transceiver until the communication connection between the tracking device and the mobile device is severed.

19. The tracking device of claim 15, wherein the mobile, device is configured to send the instruction to reduce the transmission range in response to a signal strength of the tracking device detected at the mobile device being lower than a threshold signal strength.

20. The tracking device of claim 15, wherein the mobile device is configured to send the instruction to reduce the transmission range in response to a number of connections established between the mobile device and the tracking device over a predefined time period being greater than a threshold number of connections.