Enhanced mobile location
First Claim
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1. A system for locating a mobile radio terminal by obtaining a local path loss versus range model for a radio communications network comprising:
- a processor;
a memory in communication with the processor, wherein the memory includes non-transitory instructions stored therein to cause the processor to execute the steps of;
obtaining an approximate location of a mobile radio terminal;
obtaining a set of radio signal parameter measurements taken by the mobile radio terminal, the set including at least one path loss and corresponding range measurement;
applying the at least one path loss and corresponding range measurement to a path loss versus range model to obtain a local path loss versus range model for the approximate location of the mobile radio terminal; and
in the processor, calculating an updated location of the mobile radio terminal using the local path loss versus range model with at least one path loss measurement corresponding to the approximate location, wherein the updated location is more accurate than the approximate location.
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Abstract
A method for obtaining a local path loss versus range model in a radio communications network is disclosed. The method comprises obtaining at least one path loss measurement and an associated range measurement at an approximated location of a mobile radio terminal within the radio communications network and applying this to a path loss versus range model to obtain the local path loss versus range model. The local model may also be used to obtain a more accurate location of the mobile radio terminal within the radio communications network.
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Citations
20 Claims
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1. A system for locating a mobile radio terminal by obtaining a local path loss versus range model for a radio communications network comprising:
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a processor; a memory in communication with the processor, wherein the memory includes non-transitory instructions stored therein to cause the processor to execute the steps of; obtaining an approximate location of a mobile radio terminal; obtaining a set of radio signal parameter measurements taken by the mobile radio terminal, the set including at least one path loss and corresponding range measurement; applying the at least one path loss and corresponding range measurement to a path loss versus range model to obtain a local path loss versus range model for the approximate location of the mobile radio terminal; and in the processor, calculating an updated location of the mobile radio terminal using the local path loss versus range model with at least one path loss measurement corresponding to the approximate location, wherein the updated location is more accurate than the approximate location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A processor-implemented method for locating a mobile radio terminal by obtaining a local path loss versus range model for a radio communications network, the method comprising:
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obtaining an approximate location of a mobile radio terminal; obtaining a set of radio signal parameter measurements taken by the mobile radio terminal, the set including at least one path loss and corresponding range measurement; in the processor, applying the at least one path loss and corresponding range measurement to a path loss versus range model to obtain a local path loss versus range model for the approximate location of the mobile radio terminal; and in the processor, calculating an updated location of the mobile radio terminal using the local path loss versus range model with at least one path loss measurement corresponding to the approximate location, wherein the updated location is more accurate than the approximate location; and transmitting the updated location to a destination via a network.
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20. A tangible, non-transitory, machine readable medium having instructions thereon to cause at least one machine to perform a method comprising:
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obtaining an approximate location of a mobile radio terminal; obtaining a set of radio signal parameter measurements taken by the mobile radio terminal the set including at least one path loss and corresponding range measurement; applying the at least one path loss and corresponding range measurement to a path loss versus range model to obtain a local path loss versus range model for the approximate location of the mobile radio terminal; and calculating an updated location of the mobile radio terminal using the local path loss versus range model with at least one path loss measurement corresponding to the approximate location, wherein the updated location is more accurate than the approximate location.
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Specification