PROTECTED USE OF NAVIGATION AND POSITIONING SIGNAL
First Claim
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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, either or both of;
a first symbol, selected from a first resource block having a series of successive symbols, designated for transmission of a position measurement signal by the base station during a first positioning occasion, ora first code, selected from a predetermined set of codes, with which the transmission of the position measurement signal by the base station during the 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 either or both of the first symbol or 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
35 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, either or both of; a first symbol, selected from a first resource block having a series of successive symbols, designated for transmission of a position measurement signal by the base station during a first positioning occasion, or a first code, selected from a predetermined set of codes, with which the transmission of the position measurement signal by the base station during the 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 either or both of the first symbol or the first code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. 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 the 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, either or both of; a first symbol, selected from a first resource block having a series of successive symbols, designated for transmission of a position measurement signal by the base station during a first positioning occasion, or a first code, selected from a predetermined set of codes, with which the transmission of the position measurement signal by the base station during the 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 either or both of the first symbol or the first code. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A mobile device comprising:
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means for 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; 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, either or both of; a first symbol, selected from a first resource block having a series of successive symbols, designated for transmission of a position measurement signal by the base station during a first positioning occasion, or a first code, selected from a predetermined set of codes, with which the transmission of the position measurement signal by the base station during the first positioning occasion is designated to be encoded; and means for taking a first measurement of the position measurement signal based on the determining either or both of the first symbol or the first code. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. 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, either or both of; a first symbol, selected from a first resource block having a series of successive symbols, designated for transmission of a position measurement signal by the base station during a first positioning occasion, or a first code, selected from a predetermined set of codes, with which the transmission of the position measurement signal by the base station during the first positioning occasion is designated to be encoded; and taking a first measurement of the position measurement signal based on the determining either or both of the first symbol or the first code.
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32. A method of transmitting reference signals from a base station of a wireless communication network, the method comprising:
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transmitting a position measurement signal during a first positioning occasion, wherein; the position measurement signal is transmitted during a first symbol of a first resource block having a series of successive symbols, and the position measurement signal is encoded with a first code of a predetermined set of codes; and transmitting the position measurement signal during a second positioning occasion, wherein; the position measurement signal is transmitted during a second symbol of a second resource block having a series of successive symbols, and the position measurement signal is encoded with a second code of the predetermined set of codes; wherein; the second symbol has a different order, within the second resource block, than an order of the first symbol within the first resource block, or the second code is different than the first code, or both.
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33. 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; transmit a position measurement signal, using the wireless communication interface, during a first positioning occasion, wherein; the position measurement signal is transmitted during a first symbol of a first resource block having a series of successive symbols, and the position measurement signal is encoded with a first code of a predetermined set of codes; and transmit the position measurement signal, using the wireless communication interface, during a second positioning occasion, wherein; the position measurement signal is transmitted during a second symbol of a second resource block having a series of successive symbols, and the position measurement signal is encoded with a second code of the predetermined set of codes; wherein; the second symbol has a different order, within the second resource block, than an order of the first symbol within the first resource block, or the second code is different than the first code, or both.
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34. A device comprising:
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means for transmitting a position measurement signal during a first positioning occasion, wherein; the position measurement signal is transmitted during a first symbol of a first resource block having a series of successive symbols, and the position measurement signal is encoded with a first code of a predetermined set of codes; and means for transmitting the position measurement signal during a second positioning occasion, wherein; the position measurement signal is transmitted during a second symbol of a second resource block having a series of successive symbols, and the position measurement signal is encoded with a second code of the predetermined set of codes; wherein; the second symbol has a different order, within the second resource block, than an order of the first symbol within the first resource block, or the second code is different than the first code, or both.
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35. A non-transitory, computer-readable medium having instructions embedded thereon for causing a base station of a wireless communication network to transmit reference signals, the instructions including computer code for:
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transmitting a position measurement signal during a first positioning occasion, wherein; the position measurement signal is transmitted during a first symbol of a first resource block having a series of successive symbols, and the position measurement signal is encoded with a first code of a predetermined set of codes; and transmitting the position measurement signal during a second positioning occasion, wherein; the position measurement signal is transmitted during a second symbol of a second resource block having a series of successive symbols, and the position measurement signal is encoded with a second code of the predetermined set of codes; wherein; the second symbol has a different order, within the second resource block, than an order of the first symbol within the first resource block, or the second code is different than the first code, or both.
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Specification