Method and apparatus for estimating satellite positioning reliability
First Claim
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1. A machine implemented method for determining a metric for a position fix solution of a mobile device, comprising:
- obtaining a plurality of first data items at the mobile device, the plurality of first data items comprising at least one external position injection (EPI) data item and at least one reliability indicator for the at least one EPI data item, the at least one reliability indicator indicating one or more predefined states of reliability;
computing the position fix solution of the mobile device based, at least in part, on the plurality of first data items; and
determining a metric indicative of a reliability of the computed position fix solution based, at least in part, on the at least one reliability indicator for the at least one EPI data item and on an input number of degrees-of-freedom of the plurality of first data items.
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Abstract
A position fix of a mobile device is computed based, at least in part, on a plurality of data items. A metric that is indicative of a reliability of the position fix may be generated based, at least in part, on a number of independent ones of the data items and/or an indication of reliability of at least one of the data items. In at least one implementation, the plurality of data items may include SPS satellite signals and/or pseudoranges and an externally obtained position.
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Citations
22 Claims
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1. A machine implemented method for determining a metric for a position fix solution of a mobile device, comprising:
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obtaining a plurality of first data items at the mobile device, the plurality of first data items comprising at least one external position injection (EPI) data item and at least one reliability indicator for the at least one EPI data item, the at least one reliability indicator indicating one or more predefined states of reliability; computing the position fix solution of the mobile device based, at least in part, on the plurality of first data items; and determining a metric indicative of a reliability of the computed position fix solution based, at least in part, on the at least one reliability indicator for the at least one EPI data item and on an input number of degrees-of-freedom of the plurality of first data items. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus comprising:
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a position fix computation unit to compute a position fix solution of the apparatus based, at least in part, on a plurality of first data items, the plurality of first data items comprising at least one external position injection (EPI) data item and at least one reliability indicator for the at least one EPI data item, the at least one reliability indicator indicating one or more predefined states of reliability; and a reliability determination unit to determine a metric indicative of a reliability of the computed position fix solution based, at least in part, on the at least one reliability indicator for the at least one EPI data item and on an input number of degrees-of-freedom of the plurality of first data items. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An article comprising:
a non-transitory storage medium having machine-readable instructions stored thereon which are executable by a special purpose computing apparatus to; obtain a plurality of first data items at a mobile device, the plurality of first data items comprising at least one external position injection (EPI) data item and at least one reliability indicator for the at least one EPI data item, the at least one reliability indicator indicating one or more predefined states of reliability; compute a position fix solution of the mobile device based, at least in part, on the plurality of first data items; and determine a metric indicative of a reliability of the computed position fix solution based, at least in part, on the at least one reliability indicator for the at least one EPI data item and on an input number of degrees-of-freedom of the plurality of first data items. - View Dependent Claims (14, 15, 16, 17)
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18. An apparatus for determining a metric for a position fix solution of a mobile device, comprising:
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means for obtaining a plurality of first data items at the mobile device, the plurality of first data items comprising at least one external position injection (EPI) data item and at least one reliability indicator for the at least one EPI data item, the at least one reliability indicator indicating one or more predefined states of reliability; means for computing the position fix solution of the mobile device based, at least in part, on the plurality of first data items; and means for determining a metric indicative of a reliability of the computed position fix solution based, at least in part, on the at least one reliability indicator for the at least one EPI data item and on an input number of degrees-of-freedom of the plurality of first data items. - View Dependent Claims (19, 20, 21, 22)
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Specification