Estimation of speed and direction of travel in a WLAN positioning system
First Claim
Patent Images
1. A method of inferring whether a Wi-Fi enabled device is substantially stationary, comprising:
- receiving information from signals transmitted by at least one Wi-Fi access point and received by the Wi-Fi enabled device, the receiving occurring over time;
measuring, during at least one amount of time, a first duration of time during which the Wi-Fi enabled device detects signals transmitted by the at least one Wi-Fi access point;
inferring whether the Wi-Fi enabled device is substantially stationary based on the first duration of time during which signals from the at least one Wi-Fi access point were detected; and
calculating a quality of estimation for the inference of whether the Wi-Fi enabled device is substantially stationary based on a number of Wi-Fi access points from which signals are received during the at least one amount of time.
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Abstract
A method for estimating the speed and bearing of a Wi-Fi enabled device using WLAN radio signals in a WLAN based location service is provided. A method used to estimate a speed of travel of a Wi-Fi enabled device comprises the Wi-Fi enabled device receiving signals transmitted by Wi-Fi access points in range of the Wi-Fi enabled device, and using the signals to estimate the speed of and/or direction of travel of the Wi-Fi enabled device.
129 Citations
16 Claims
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1. A method of inferring whether a Wi-Fi enabled device is substantially stationary, comprising:
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receiving information from signals transmitted by at least one Wi-Fi access point and received by the Wi-Fi enabled device, the receiving occurring over time; measuring, during at least one amount of time, a first duration of time during which the Wi-Fi enabled device detects signals transmitted by the at least one Wi-Fi access point; inferring whether the Wi-Fi enabled device is substantially stationary based on the first duration of time during which signals from the at least one Wi-Fi access point were detected; and calculating a quality of estimation for the inference of whether the Wi-Fi enabled device is substantially stationary based on a number of Wi-Fi access points from which signals are received during the at least one amount of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for inferring whether a Wi-Fi enabled device is substantially stationary, comprising:
at least one non-transitory computer-readable media comprising instructions that when executed cause a computer system to; receive information from signals transmitted by at least one Wi-Fi access point and received by the Wi-Fi enabled device, the receiving occurring over time; measure, during at least one amount of time, a first duration of time during which the Wi-Fi enabled device detects signals transmitted by the at least one Wi-Fi access point; infer whether the Wi-Fi enabled device is substantially stationary based on the first duration of time during which signals from the at least one Wi-Fi access points were detected; and calculate a quality of estimation for the inference of whether the Wi-Fi enabled device is substantially stationary based on a number of Wi-Fi access points from which signals are received during the at least one amount of time.
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10. A non-transitory computer readable medium having software stored thereon for inferring whether a Wi-Fi enabled device is substantially stationary, the software when executed operable to:
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process signals transmitted by a plurality of Wi-Fi access points and received by the Wi-Fi enabled device over at least one amount of time; measure, during the at least one amount of time, a duration of time during which the Wi-Fi enabled device detects signals transmitted by each of the plurality of Wi-Fi access points; average the durations of time during which the Wi-Fi enabled device detects signals transmitted by each of the plurality of Wi-Fi access points to produce an average total duration of time; infer whether the Wi-Fi enabled device is substantially stationary based on the average total duration of time; and use the inference whether the Wi-Fi enabled device is substantially stationary in a location based service provided to a user on the Wi-Fi enabled device. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification