Protected use of navigation and positioning signal
First Claim
Patent Images
1. A method of obtaining reference signals with a mobile device in a wireless communication network, the method comprising:
- obtaining, at the mobile device, base station information for a plurality of base stations in the wireless communication network, the base station information comprising a location and an identifier of each base station of the plurality of base stations;
obtaining, with a mobile device, seed information for a base station of the plurality of base stations;
determining, based on the base station information for the base station and the seed information, a first code, selected from a predetermined set of codes, with which a broadcast of a position measurement signal by the base station during a first positioning occasion is designated to be encoded; and
taking a first measurement, with the mobile device, of the position measurement signal based on the determining the first code.
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Abstract
A periodically-transmitted reference signal can have certain proprietary properties to help to help prevent unauthorized detection and utilization of the signal. More specifically, a base station can adjust times at which a reference signal is transmitted and/or a code with which the signal is encoded. These adjustments may be based on an equation or algorithm, which can be shared with particular mobile devices as needed.
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Citations
34 Claims
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1. A method of obtaining reference signals with a mobile device in a wireless communication network, the method comprising:
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obtaining, at the mobile device, base station information for a plurality of base stations in the wireless communication network, the base station information comprising a location and an identifier of each base station of the plurality of base stations; obtaining, with a mobile device, seed information for a base station of the plurality of base stations; determining, based on the base station information for the base station and the seed information, a first code, selected from a predetermined set of codes, with which a broadcast of a position measurement signal by the base station during a first positioning occasion is designated to be encoded; and taking a first measurement, with the mobile device, of the position measurement signal based on the determining the first code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A device comprising:
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a wireless communication interface; a memory; and a processing unit communicatively coupled with the wireless communication interface and the memory and configured to; obtain base station information for a plurality of base stations in a wireless communication network, the base station information comprising a location and an identifier of each base station of the plurality of base stations; obtain seed information for a base station of the plurality of base stations; determine, based on the base station information for the base station and the seed information, a first code, selected from a predetermined set of codes, with which a broadcast of a position measurement signal by the base station during a first positioning occasion is designated to be encoded; and take a first measurement, using the wireless communication interface, of the position measurement signal based on the determining the first code. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A mobile device comprising:
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means for obtaining base station information for a plurality of base stations in a wireless communication network, the base station information comprising a location and an identifier of each base station of the plurality of base stations; means for obtaining seed information for a base station of the plurality of base stations; means for determining, based on the base station information for the base station and the seed information a first code, selected from a predetermined set of codes, with which a broadcast of a position measurement signal by the base station during a first positioning occasion is designated to be encoded; and means for taking a first measurement of the position measurement signal based on the determining the first code. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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30. A non-transitory, computer-readable medium having instructions embedded thereon for causing a mobile device to obtain reference signals a wireless communication network, the instructions including computer code for:
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obtaining base station information for a plurality of base stations in the wireless communication network, the base station information comprising a location and an identifier of each base station of the plurality of base stations; obtaining seed information for a base station of the plurality of base stations; determining, based on the base station information for the base station and the seed information, a first code, selected from a predetermined set of codes, with which a broadcast of a position measurement signal by the base station during a first positioning occasion is designated to be encoded; and taking a first measurement of the position measurement signal based on the determining the first code.
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31. A method of broadcasting reference signals from a base station of a wireless communication network, the method comprising:
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broadcasting a position measurement signal during a first positioning occasion, wherein the position measurement signal is encoded with a first code of a predetermined set of codes; and broadcasting the position measurement signal during a second positioning occasion, wherein the position measurement signal is encoded with a second code of the predetermined set of codes; wherein the second code is different than the first code.
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32. A base station comprising:
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a wireless communication interface; a memory; and a processing unit communicatively coupled with the wireless communication interface and the memory and configured to; broadcast a position measurement signal, using the wireless communication interface, during a first positioning occasion, wherein the position measurement signal is encoded with a first code of a predetermined set of codes; and broadcast the position measurement signal, using the wireless communication interface, during a second positioning occasion, wherein the position measurement signal is encoded with a second code of the predetermined set of codes; wherein the second code is different than the first code.
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33. A device comprising:
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means for broadcasting a position measurement signal during a first positioning occasion, wherein the position measurement signal is encoded with a first code of a predetermined set of codes; and means for broadcasting the position measurement signal during a second positioning occasion, wherein the position measurement signal is encoded with a second code of the predetermined set of codes; wherein the second code is different than the first code.
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34. A non-transitory, computer-readable medium having instructions embedded thereon for causing a base station of a wireless communication network to broadcast reference signals, the instructions including computer code for:
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broadcasting a position measurement signal during a first positioning occasion, wherein the position measurement signal is encoded with a first code of a predetermined set of codes; and broadcasting the position measurement signal during a second positioning occasion, wherein the position measurement signal is encoded with a second code of the predetermined set of codes; wherein the second code is different than the first code.
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Specification