E911 positioning via background signal tracking
First Claim
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1. A method for background signal tracking at a mobile device comprising:
- obtaining, via decoding one or more signal parameters with a processor, one or more observations of one or more terrestrial signals;
storing the one or more observations in a local memory of the mobile device;
retrieving, via accessing the local memory of the mobile device and in response to an emergency event, the one or more stored observations for use, at least in part, in narrowing the size of a search window of an expected uncertainty parameter for acquisition of one or more reference signals, the expected uncertainty parameter being provided in a message received at the mobile device and indicative of the emergency event; and
computing, via the processor, a position fix of the mobile device based, at least in part, on the one or more retrieved observations.
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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 and/or techniques for improved E911 positioning via background signal tracking, such as for use in or with a mobile communication device, for example.
20 Citations
28 Claims
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1. A method for background signal tracking at a mobile device comprising:
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obtaining, via decoding one or more signal parameters with a processor, one or more observations of one or more terrestrial signals; storing the one or more observations in a local memory of the mobile device; retrieving, via accessing the local memory of the mobile device and in response to an emergency event, the one or more stored observations for use, at least in part, in narrowing the size of a search window of an expected uncertainty parameter for acquisition of one or more reference signals, the expected uncertainty parameter being provided in a message received at the mobile device and indicative of the emergency event; and computing, via the processor, a position fix of the mobile device based, at least in part, on the one or more retrieved observations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for background signal tracking comprising:
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means for obtaining, via decoding one or more signal parameters with a processor, one or more observations of one or more terrestrial signals; means for storing the one or more observations in a local memory of the mobile device; means for retrieving, via accessing the local memory of the mobile device and in response to an emergency event, the one or more stored observations for use, at least in part, in narrowing the size of a search window of an expected uncertainty parameter for acquisition of one or more reference signals, the expected uncertainty parameter being provided in a message received at the mobile device and indicative of the emergency event; and means for computing, via the processor, a position fix of a mobile device based, at least in part, on the one or more retrieved observations. - View Dependent Claims (17, 18)
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19. An apparatus for background signal tracking comprising:
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a wireless transceiver to communicate with an electronic communications network, the wireless transceiver configured to; obtain, via decoding one or more signal parameters with one or more processors, one or more observations of one or more terrestrial signals; and the one or more processors coupled to a memory and to the wireless transceiver, the one or more processors configured to; store the one or more observations in a local memory of the mobile device; retrieve, via accessing the local memory of the mobile device and in response to an emergency event, the one or more stored observations for use, at least in part, in narrowing the size of a search window of an expected uncertainty parameter for acquisition of one or more reference signals, the expected uncertainty parameter being provided in a message received at the mobile device and indicative of the emergency event; and compute, via the one or more processors, a position fix of a mobile device based, at least in part, on the one or more retrieved observations. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27)
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28. A non-transitory storage medium having instructions executable by a processor to:
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obtain, via decoding one or more signal parameters with the processor, one or more observations of one or more terrestrial signals; store the one or more observations in a local memory of the mobile device; retrieve, via accessing the local memory of the mobile device and in response to an emergency event, the one or more stored observations for use, at least in part, in narrowing the size of a search window of an expected uncertainty parameter for acquisition of one or more reference signals, the expected uncertainty parameter being provided in a message received at the mobile device and indicative of the emergency event; and compute, via the processor, a position fix of a mobile device based, at least in part, on the one or more retrieved observations.
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Specification