Indoor navigation with low energy location beacons
First Claim
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1. A low energy location beacon comprising:
- a memory that stores;
a fixed location of the beacon, the location expressed in a local coordinate system, and a location of a reference point of the local coordinate system expressed in a geocoordinate system; and
,a radio transmitter that is connected to an antenna, the transmitter periodically broadcasting the fixed location of the beacon and the location of the reference point that are stored in the memory.
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Abstract
Low energy location beacons provide a robust indoor navigation solution that is potentially accessible to anyone with a cell phone.
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Citations
24 Claims
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1. A low energy location beacon comprising:
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a memory that stores;
a fixed location of the beacon, the location expressed in a local coordinate system, and a location of a reference point of the local coordinate system expressed in a geocoordinate system; and
,a radio transmitter that is connected to an antenna, the transmitter periodically broadcasting the fixed location of the beacon and the location of the reference point that are stored in the memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A non-transitory, computer-readable medium having instructions stored thereon that when executed by a microprocessor in a cell phone cause a method for estimating cell phone position to be performed, the method comprising:
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receiving position broadcasts from one or more low energy location beacons located at fixed positions, each broadcast including the position of the beacon from which it was sent, each broadcast having a transmitted signal strength, and each broadcast received with a received signal strength; and
,performing a weighted average of received beacon positions to estimate cell phone position. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A non-transitory, computer-readable medium having instructions stored thereon that when executed by a microprocessor in a low energy location beacon cause a method for transmitting beacon position to be performed, the method comprising:
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reading a fixed location of the beacon from a memory, the location expressed in a local coordinate system, and a location of a reference point of the local coordinate system expressed in a geocoordinate system; and
,using a radio transmitter that is connected to an antenna to periodically broadcast the fixed location of the beacon and the location of the reference point that are stored in the memory. - View Dependent Claims (23, 24)
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Specification