Hybrid positioning techniques based on RTT and TOA/TDOA
First Claim
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1. A method for location determination at a mobile device comprising:
- determining a location of said mobile device based, at least in part, on a measurement of a round-trip time (RTT) of a message exchange with one or more stationary transponder devices;
estimating a bias between a first clock maintained at said mobile device and a second clock maintained at said one or more stationary transponder devices based, at least in part, on a difference between said determined location and locations of said one or more stationary transponder devices, and a timing reference detected in one or more first signals acquired from said one or more stationary transponder devices; and
computing a range to said one or more stationary transponder devices based, at least in part, on a time of flight-related measurement acquired from said one or more first signals and on said estimated bias.
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Abstract
Example methods, apparatuses, or articles of manufacture are disclosed herein that may be utilized, in whole or in part, to facilitate or support one or more operations or techniques for hybrid RTT and TOA positioning, such as for use in or with a mobile communication device, for example.
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Citations
40 Claims
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1. A method for location determination at a mobile device comprising:
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determining a location of said mobile device based, at least in part, on a measurement of a round-trip time (RTT) of a message exchange with one or more stationary transponder devices; estimating a bias between a first clock maintained at said mobile device and a second clock maintained at said one or more stationary transponder devices based, at least in part, on a difference between said determined location and locations of said one or more stationary transponder devices, and a timing reference detected in one or more first signals acquired from said one or more stationary transponder devices; and computing a range to said one or more stationary transponder devices based, at least in part, on a time of flight-related measurement acquired from said one or more first signals and on said estimated bias. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for location determination comprising:
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means for determining a location of a mobile device based, at least in part, on a measurement of a round-trip time (RTT) of a message exchange with one or more stationary transponder devices; means for estimating a bias between a first clock maintained at said mobile device and a second clock maintained at said one or more stationary transponder devices based, at least in part, on a difference between said determined location and locations of said one or more stationary transponder devices, and a timing reference detected in one or more first signals acquired from said one or more stationary transponder devices; and means for computing a range to said one or more stationary transponder devices based, at least in part, on a time of flight-related measurement acquired from said one or more first signals and on said estimated bias. - View Dependent Claims (18, 19)
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20. An apparatus for location determination comprising:
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a wireless transceiver to communicate with an electronic communications network; and one or more processors coupled to a memory to; determine a location of a mobile device based, at least in part, on a measurement of a round-trip time (RTT) of a message exchange with one or more stationary transponder devices; estimate a bias between a first clock maintained at said mobile device and a second clock maintained at said one or more stationary transponder devices to be based, at least in part, on a difference between said determined location and locations of said one or more stationary transponder devices, and a timing reference detected in one or more first signals acquired from said one or more stationary transponder devices; and compute a range to said one or more stationary transponder devices to be based, at least in part, on a time of flight-related measurement acquired from said one or more first signals and on said estimated bias. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A non-transitory storage medium having instructions executable by a processor to:
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determine a location of a mobile device based, at least in part, on a measurement of a round-trip time (RTT) of a message exchange with one or more stationary transponder devices; estimate a bias between a first clock maintained at said mobile device and a second clock maintained at said one or more stationary transponder devices based, at least in part, on a difference between said determined location and locations of said one or more stationary transponder devices, and a timing reference detected in one or more first signals acquired from said one or more stationary transponder devices; and compute a range to said one or more stationary transponder devices based, at least in part, on a time of flight-related measurement acquired from said one or more first signals and on said estimated bias.
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36. A method for location determination at a server device comprising:
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collecting estimates of a bias between a first clock maintained at a first mobile device and a second clock maintained at one or more stationary transponder devices, said bias being determined based, at least in part, on a difference between a location of said first mobile device and locations of said one or more stationary transponder devices, and a timing reference detected in one or more signals acquired from said one or more stationary transponder devices; and making available said estimates of said bias as part of positioning assistance data for computing a range from said first mobile device or one or more other mobile devices to said one or more stationary transponder devices based, at least in part, on a time of flight-related measurement acquired from said one or more signals and on said estimates of said bias. - View Dependent Claims (37, 38)
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39. An apparatus for location determination comprising:
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a communication interface to communicate with an electronic communications network; and one or more processors coupled to a memory to; collect estimates of a bias between a first clock maintained at a first mobile device and a second clock maintained at one or more stationary transponder devices, said bias to be determined based, at least in part, on a difference between a location of said first mobile device and locations of said one or more stationary transponder devices, and a timing reference detected in one or more signals acquired from said one or more stationary transponder devices; and make available said estimates of said bias as part of positioning assistance data for computing a range said first mobile device or one or more other mobile devices to said one or more stationary transponder devices to be based, at least in part, on a time of flight-related measurement acquired from said one or more signals and on said estimates of said bias. - View Dependent Claims (40)
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Specification