Crowd size estimation based on wireless signal absorption
First Claim
1. A method of estimating crowd size based on detected wireless signal absorption, the method comprising:
- receiving, by a receiving device, a plurality of wireless signals from a plurality of transmitting devices;
detecting a plurality of power levels for the plurality of wireless signals, wherein each power level of the plurality of power levels corresponds to one of the plurality of wireless signals;
analyzing, by one or more processors, the plurality of power levels to determine three characteristic power levels of the plurality of power levels;
calculating, by the one or more processors, an absorption amount based on the three characteristic power levels; and
estimating, by the one or more processors, a number of people based at least in part on the absorption amount.
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Accused Products
Abstract
Methods and devices for detecting wireless signal absorption using power sensing circuitry. One method includes receiving, by a receiving device having power sensing circuitry, a plurality of wireless signals from a plurality of transmitting devices. The power sensing circuitry may include a local oscillator, a mixer, and a band-pass filter. The method may also include detecting, by the power sensing circuitry, a plurality of power levels for the plurality of wireless signals, where each power level of the plurality of power levels corresponds one of the plurality of wireless signals. The method may further include analyzing, by one or more processors, the plurality of power levels to determine three characteristic power levels of the plurality of power levels. The method may further include calculating, by the one or more processors, an absorption amount based on the three characteristic power levels.
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Citations
17 Claims
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1. A method of estimating crowd size based on detected wireless signal absorption, the method comprising:
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receiving, by a receiving device, a plurality of wireless signals from a plurality of transmitting devices; detecting a plurality of power levels for the plurality of wireless signals, wherein each power level of the plurality of power levels corresponds to one of the plurality of wireless signals; analyzing, by one or more processors, the plurality of power levels to determine three characteristic power levels of the plurality of power levels; calculating, by the one or more processors, an absorption amount based on the three characteristic power levels; and estimating, by the one or more processors, a number of people based at least in part on the absorption amount. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A receiving device for estimating crowd size based on detected wireless signal absorption, the receiving device comprising:
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an antenna for receiving a plurality of wireless signals from a plurality of transmitting devices; power sensing circuitry for detecting a plurality of power levels for the plurality of wireless signals, wherein each power level of the plurality of power levels corresponds to one of the plurality of wireless signals; and one or more processors configured to perform operations including; analyzing the plurality of power levels to determine three characteristic power levels of the plurality of power levels; calculating an absorption amount based on the three characteristic power levels; and estimating a number of people based at least in part on the absorption amount. - View Dependent Claims (8, 9, 10, 11)
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12. A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors, cause the one or more processors to perform operations including:
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receiving a plurality of wireless signals from a plurality of transmitting devices; detecting a plurality of power levels for the plurality of wireless signals, wherein each power level of the plurality of power levels corresponds to one of the plurality of wireless signals; analyzing the plurality of power levels to determine three characteristic power levels of the plurality of power levels; calculating an absorption amount based on the three characteristic power levels; and estimating a number of people based at least in part on the absorption amount. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification