Vehicle tracking and security system incorporating simultaneous voice and data communication
AssigneeNavox Corporation
InventorsRobert L. Hillman, Barry L. Dorr
Life of this patent
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Abstract
A system that tracks and monitors a vehicle by utilizing cellular communication componentry and global positioning system componentry is disclosed. The system provides for simultaneous and continuous transmission of a voice signal and location data to a monitoring center. The monitoring center comprises componentry to communicate with the vehicle and determine the vehicle's location on a digitized map using a computer. In one embodiment, the location data is modulated onto a carrier and the modulated carrier is inserted into a relatively narrow band of frequencies that have been removed from an audio data channel such as, for example, a cellular telephone voice channel.
Claims7
A method for automatically tracking the location of a vehicle while providing quality simultaneous voice transmission with said vehicle comprising the steps of:
- filtering out a narrow band of frequencies from the audio band of a communication path between said vehicle and a remote tracking monitor station;
- inserting vehicle position data from a global position system receiver located with said vehicle into said narrow band of frequencies, said data having a transmission rate lower than the lowest frequency of said frequency band;
- and
- removing said vehicle position data at said remote tracking station to ascertain the position of said vehicle.
A method for automatically tracking the location of a vehicle while providing simultaneous voice transmission with said vehicle, comprising:
- filtering out a first band of frequencies from an audio band of a cellular telephone communication link between said vehicle and a remote tracking station;
- obtaining vehicle position data;
- modulating a carrier according to said vehicle position data to produce a modulated carrier, a bandwidth of said modulated carrier being compatible with said first band of frequencies;
- inserting said modulated carrier into said cellular telephone communication link at said first band of frequencies;
- and
- extracting said vehicle position data at said remote tracking station to ascertain the position of said vehicle.
Dependencies are inferred from the claim text.