Electronic navigation system and method
First Claim
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1. A system for providing tracking information comprising:
- a first mobile computing unit;
a second mobile computing unit;
a base unita wireless communications link to transmit request data messages from said first computing mobile unit and said second computing mobile unit to said base unit and to transmit response data messages from the base unit to the first computing mobile unit and said second computing mobile unit;
wherein said base unitreceives said request data message from said first mobile computing unit for geographic position information of said second mobile computing unit, wherein said request data message includes data identifying the first mobile computing unit and data specifying a request for tracking information,obtains a current position of said second mobile computing unit, andprovides said response data message to the first mobile computing unit indicating said current position of said second mobile computing unit,receives said request data message from said second mobile computing unit for geographic position information of said first mobile computing unit, wherein said request data message includes data identifying the second mobile computing unit and data specifying a request for tracking information,obtains a current position of said first mobile computing unit, andprovides said response data message to the second mobile computing unit indicating said current position of said first mobile computing unit.
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Abstract
The invention provides a system for providing tracking information. The system includes a base unit that receives a request from a first mobile unit and provides a response to the first mobile unit. The base unit obtains a current position of a second mobile unit. The response from the base unit to the mobile unit indicates the current position of the second mobile unit.
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Citations
14 Claims
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1. A system for providing tracking information comprising:
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a first mobile computing unit; a second mobile computing unit; a base unit a wireless communications link to transmit request data messages from said first computing mobile unit and said second computing mobile unit to said base unit and to transmit response data messages from the base unit to the first computing mobile unit and said second computing mobile unit; wherein said base unit receives said request data message from said first mobile computing unit for geographic position information of said second mobile computing unit, wherein said request data message includes data identifying the first mobile computing unit and data specifying a request for tracking information, obtains a current position of said second mobile computing unit, and provides said response data message to the first mobile computing unit indicating said current position of said second mobile computing unit, receives said request data message from said second mobile computing unit for geographic position information of said first mobile computing unit, wherein said request data message includes data identifying the second mobile computing unit and data specifying a request for tracking information, obtains a current position of said first mobile computing unit, and provides said response data message to the second mobile computing unit indicating said current position of said first mobile computing unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of enabling a first mobile computing unit to track a second mobile computing unit, the method comprising:
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receiving a request data message at a base computing unit from said first mobile computing unit, wherein said request data message includes data identifying the first mobile computing unit and data specifying a request for geographic position information of said second mobile computing unit, wherein said second mobile unit is not associated with a vehicle and said second mobile unit requests data from said base computing unit and displays said data received from said base unit on a display; determining a current position of said second mobile computing unit; and providing a response data message from the base computing unit to the first mobile computing unit indicating said current position of said second mobile computing unit, wherein said request data message and said response data message are transmitted through a wireless communications link. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification