Method and apparatus for receiving a global positioning system signal using a cellular acquisition signal
First Claim
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1. A method for determining position of a Global Positioning System (GPS) handheld device in proximity to a base station of a wireless network, the method comprising:
- obtaining from the base station without having to have fee-based access to the wireless network at least one of location information and identification information; and
determining, responsive to the at least one of location information and identification information, a position estimate of the GPS handheld device.
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Abstract
Method and apparatus for a GPS device that uses at least one cellular acquisition signal is described. More particularly, a GPS device is configured to receive at least one cellular acquisition signal for obtaining benefits associated with AGPS with only a small subset of AGPS circuitry to interact with a cell phone network. This facilitates use of GPS devices without subscription to a cell phone service provider, thus avoiding cellular subscription fees.
99 Citations
20 Claims
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1. A method for determining position of a Global Positioning System (GPS) handheld device in proximity to a base station of a wireless network, the method comprising:
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obtaining from the base station without having to have fee-based access to the wireless network at least one of location information and identification information; and
determining, responsive to the at least one of location information and identification information, a position estimate of the GPS handheld device. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. The method of claim 8, wherein determining the position estimate comprises:
using the cell identifier to obtain a location of the base station from a lookup table having a relationship between the location and the cell identifier.
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9. A Global Positioning System (GPS) mobile device, comprising:
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at least one antenna;
a first front end communicatively coupled to the at least one antenna, the first front end being adapted to receive an acquisition signal from a wireless network;
a second front end communicatively coupled to the at least one antenna, the second front end being adapted to receive a satellite signal from at least one satellite of a GPS network;
a baseband processor adapted to (i) receive from the first front end a first signal that is associated with the acquisition signal, and (ii) receive from the second front end a second signal that is associated with the satellite signal;
a reference oscillator communicatively coupled to the baseband processor;
a general-purpose processor communicatively coupled to the baseband processor; and
memory communicatively coupled to the general-purpose processor.
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- 10. The device of claim 10, wherein the device does not comprise a transmitter for transmitting signals to the wireless network.
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15. A method for determining position of a Global Positioning System (GPS) handheld device in proximity to a base station of a wireless network, the method comprising:
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obtaining from the base station without having to transmit a signal to the wireless network at least one of location information and identification information;
determining, responsive to the at least one of location information and identification information, a position estimate of the GPS handheld device. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification