Method and system for restricting the use of position determining devices to defined regions
First Claim
1. A position determining system comprising a position determining component for receiving satellite based positional information, a memory for storing geographic information, a comparator for comparing information from the position determining component to geographic information from the memory, a data I/O, and a controller for controlling the functionality of the position determining component or controlling the data flow to the data I/O or controlling subsequent processing of the satellite based positional information, or including an offset distance into subsequent processing of the satellite based positional information, depending on the output of the comparator.
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Accused Products
Abstract
In a position determining system that includes a position determining component such as a GPS receiver, and a controller, the system is made geographically dependent by providing a memory with geographic information to which position information from the position determining component is compared to determine whether the system is being used outside the permissible geographic region.
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Citations
16 Claims
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1. A position determining system comprising
a position determining component for receiving satellite based positional information, a memory for storing geographic information, a comparator for comparing information from the position determining component to geographic information from the memory, a data I/O, and a controller for controlling the functionality of the position determining component or controlling the data flow to the data I/O or controlling subsequent processing of the satellite based positional information, or including an offset distance into subsequent processing of the satellite based positional information, depending on the output of the comparator.
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7. A position determining system, comprising
a position determining component for receiving satellite based positional information, a memory for storing geographic information, a comparator for comparing information from the position determining component to geographic information from the memory, a data I/O, a communications component for communicating with a remote device, and a controller for controlling the functionality of the position determining component or of the wireless receiver or controlling the data flow to the data I/O or controlling subsequent processing of the satellite based positional information, or including an offset distance into subsequent processing of the satellite based positional information, depending on the output of the comparator.
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15. A method of controlling the importation of grey market position determining systems that include a position determining component, a controller and a memory, the method comprising
storing geographic location parameters in the memory, comparing positional information from the position determining component to the geographic location parameters to determine whether the system is located within the confines of the geographic location parameters, and deactivating or modifying at least part of the system if the system is determined to be located outside the geographic location parameters.
Specification