METHODS AND APPARATUS FOR UPDATING INFORMATION USED IN GENERATING A SIGNAL PREDICTION MAP
First Claim
1. A method of operating a network device, the method comprising:
- receiving a signal measurement and a position of a first mobile wireless device;
updating a previous distribution of a first signal prediction map generation parameter based on the signal measurement and the position of the first mobile wireless device to generate an updated distribution of the first signal prediction map generation parameter, said first signal prediction map generation parameter being a building structure dependent parameter; and
transmitting a prediction parameter update signal communicating the updated distribution of the first signal prediction map generation parameter to a mobile wireless device.
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Abstract
A set of signal prediction map generation parameters, used to generate a signal prediction map to determine mobile device location, are initially modeled as large variance random variables. A network device, e.g., a server, receives estimated positions of mobiles and corresponding signal measurements, e.g., received signal power measurements, taken at those estimated positions by the mobiles. Received signal measurement information and corresponding estimated position information from a mobile is used to update one or more of the signal prediction map generation parameter distributions. After multiple updates to a distribution of a signal prediction map generation parameter, the network node transmits a prediction parameter update signal communicating the new distribution of the signal prediction parameter to be subsequently used by the mobile devices in the system when generating a signal prediction map and estimating its position.
15 Citations
20 Claims
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1. A method of operating a network device, the method comprising:
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receiving a signal measurement and a position of a first mobile wireless device; updating a previous distribution of a first signal prediction map generation parameter based on the signal measurement and the position of the first mobile wireless device to generate an updated distribution of the first signal prediction map generation parameter, said first signal prediction map generation parameter being a building structure dependent parameter; and transmitting a prediction parameter update signal communicating the updated distribution of the first signal prediction map generation parameter to a mobile wireless device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A network device comprising:
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means for receiving a signal measurement and a position of a first mobile wireless device; means for updating a previous distribution of a first signal prediction map generation parameter based on the signal measurement and the position of the first mobile wireless device to generate an updated distribution of the first signal prediction map generation parameter, said first signal prediction map generation parameter being a building structure dependent parameter; and means for transmitting a prediction parameter update signal communicating the updated distribution of the first signal prediction map generation parameter to a mobile wireless device. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A computer program product for use in a network device, the computer program product comprising:
a non-transitory computer readable medium comprising; code for causing at least one computer to receive a signal measurement and a position of a first mobile wireless device; code for causing said at least one computer to updating a previous distribution of a first signal prediction map generation parameter based on the signal measurement and the position of the first mobile wireless device to generate an updated distribution of the first signal prediction map generation parameter, said first signal prediction map generation parameter being a building structure dependent parameter; and code for causing said at least one computer to transmit a prediction parameter update signal communicating the updated distribution of the first signal prediction map generation parameter to a mobile wireless device. - View Dependent Claims (14)
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15. A network device comprising:
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at least one processor configured to; receive a signal measurement and a position of a first mobile wireless device; update a previous distribution of a first signal prediction map generation parameter based on the signal measurement and the position of the first mobile wireless device to generate an updated distribution of the first signal prediction map generation parameter, said first signal prediction map generation parameter being a building structure dependent parameter; and transmit a prediction parameter update signal communicating the updated distribution of the first signal prediction map generation parameter to a mobile wireless device; and memory coupled to said at least one processor. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification