Methods and apparatuses for use with mode-switchable navigation
First Claim
Patent Images
1. A method for use in determining a position of a mobile device, the method comprising, at the mobile device:
- acquiring, using a radio-frequency (RF) receiver of a position locating circuitry of the mobile device and during a first mode of operation of the position locating circuitry, satellite positioning signals at a particular rate, wherein the satellite positioning signals are transmitted by a plurality of space vehicles;
tracking the plurality of space vehicles based on the satellite positioning signals acquired during the first mode of operation;
determining, respectively, a measured signal strength value for each one of the plurality of space vehicles being tracked based on the satellite positioning signals acquired during the first mode of operation;
in response to determining that the respective measured signal strength value for each one of the space vehicles being tracked is at least a threshold signal strength value, initiating a change from the first mode of operation of the position locating circuitry to a second mode of operation of the position locating circuitry; and
acquiring, using the RF receiver and during the second mode of operation, signals from one or more of the plurality of space vehicles at a rate less often than that of the first mode of operation.
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Abstract
Methods and apparatuses are provided for use with mode switchable navigation radios and the like. The methods and apparatuses may be implemented to selectively switch between certain operating modes based, at least in part, one or more determinations relating to one or more satellite positioning signals and/or space vehicles.
34 Citations
20 Claims
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1. A method for use in determining a position of a mobile device, the method comprising, at the mobile device:
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acquiring, using a radio-frequency (RF) receiver of a position locating circuitry of the mobile device and during a first mode of operation of the position locating circuitry, satellite positioning signals at a particular rate, wherein the satellite positioning signals are transmitted by a plurality of space vehicles; tracking the plurality of space vehicles based on the satellite positioning signals acquired during the first mode of operation; determining, respectively, a measured signal strength value for each one of the plurality of space vehicles being tracked based on the satellite positioning signals acquired during the first mode of operation; in response to determining that the respective measured signal strength value for each one of the space vehicles being tracked is at least a threshold signal strength value, initiating a change from the first mode of operation of the position locating circuitry to a second mode of operation of the position locating circuitry; and acquiring, using the RF receiver and during the second mode of operation, signals from one or more of the plurality of space vehicles at a rate less often than that of the first mode of operation. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A mobile device comprising:
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position locating circuitry configured to; acquire, using a radio-frequency (RF) receiver of the position locating circuitry and during a first mode of operation, satellite positioning signals at a particular rate, wherein the satellite positioning signals are transmitted by a plurality of space vehicles; track the plurality of space vehicles based on the satellite positioning signals acquired during the first mode of operation; and determine, respectively, a measured signal strength value for each one of the plurality of space vehicles being tracked based on the satellite positioning signals acquired during the first mode of operation; and a controller coupled to the position locating circuitry and configured to; in response to determining that the respective measured signal strength value for each one of the space vehicles being tracked is at least a threshold signal strength value, initiate a change in the position location circuitry from the first mode of operation to a second mode of operation, wherein the position locating circuitry is further configured to acquire, using the RF receiver and during the second mode of operation, signals from one or more of the plurality of space vehicles at a rate less often than that of the first mode of operation. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. An apparatus for use in determining a position of a mobile device, the apparatus comprising:
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means for acquiring, during a first mode of operation of the apparatus, satellite positioning signals at a particular rate, wherein the satellite positioning signals are transmitted by a plurality of space vehicles; means for tracking the plurality of space vehicles based on the satellite positioning signals acquired during the first mode of operation; means for determining, respectively, a measured signal strength value for each one of the plurality of space vehicles being tracked based on the satellite positioning signals acquired during the first mode of operation; means for determining that the respective measured signal strength value for each one of the space vehicles being tracked is at least a threshold signal strength value; means for initiating a change from the first mode of operation of the apparatus to a second mode of operation of the apparatus in response to a determination that the respective measured signal strength value for each one of the space vehicles being tracked is at least the threshold signal strength value; and means for acquiring, during the second mode of operation, signals from one or more of the plurality of space vehicles at a rate less often than that of the first mode of operation. - View Dependent Claims (16, 17)
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18. A computer-readable non-transitory storage medium having computer implementable instructions stored thereon that are executable by one or more processing units of a mobile device to:
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acquire, during a first mode of operation of the mobile device, satellite positioning signals at a particular rate, wherein the satellite positioning signals are transmitted by a plurality of space vehicles; track the plurality of space vehicles based on the satellite positioning signals acquired during the first mode of operation; determine, respectively, a measured signal strength value for each one of the plurality of space vehicles being tracked based on the satellite positioning signals acquired during the first mode of operation; determine that the respective measured signal strength value for each one of the space vehicles being tracked is at least a threshold signal strength value; and initiate a change from the first mode of operation of the mobile device to a second mode of operation of the mobile device in response to determining that the respective measured signal strength value for each one of the space vehicles being tracked is at least the threshold signal strength value; and acquire, during the second mode of operation, signals from one or more of the plurality of space vehicles at a rate less often than that of the first mode of operation. - View Dependent Claims (19, 20)
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Specification