System for controlling operations of GPS receiver unit and radio telephone unit for automotive vehicle
First Claim
1. A system for controlling operations of a GPS receiver unit and a radio telephone unit, said GPS receiver unit including a GPS antenna for receiving a GPS signal and a GPS signal receiver circuit connected to the GPS antenna for processing the received GPS signal, said radio telephone unit including a telephone antenna and a telephone transmitter circuit connected to the telephone antenna for transmitting a call channel signal during a time when the radio telephone unit is in an ON-CALL MODE and a control channel signal during a time when the radio telephone unit is in an OFF-CALL MODE, said system comprising:
- monitor means for determining whether said radio telephone unit is in said ON-CALL MODE or said OFF-CALL MODE only when a signal level of the received GPS signal is less than a preselected value; and
operation control means for setting said telephone transmitter circuit operative to transmit said call channel signal through said telephone antenna and for setting said GPS signal receiver circuit inoperative during a time when said radio telephone unit is in the ON-CALL MODE,wherein said operation control means selectively sets said telephone transmitter circuit operative to transmit said control channel signal through said telephone antenna during a time when said radio telephone unit is in the OFF-CALL MODE.
1 Assignment
0 Petitions
Accused Products
Abstract
An operation control system includes a GPS receiver unit and a radio telephone unit. The GPS receiver unit includes a GPS antenna and a GPS signal receiver circuit connected thereto. The radio telephone unit includes a telephone antenna and a transmitter circuit connected thereto. The transmitter circuit transmits a call channel signal through the telephone antenna during the radio telephone unit being in an ON-CALL MODE and a control channel signal during an OFF-CALL MODE. The system is designed to set the transmitter circuit operative and the GPS signal receiver circuit inoperative during the ON-CALL MODE. On the other hand, the system allows alternate operations of the transmitter circuit and the GPS signal receiver circuit during the OFF-CALL MODE.
83 Citations
15 Claims
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1. A system for controlling operations of a GPS receiver unit and a radio telephone unit, said GPS receiver unit including a GPS antenna for receiving a GPS signal and a GPS signal receiver circuit connected to the GPS antenna for processing the received GPS signal, said radio telephone unit including a telephone antenna and a telephone transmitter circuit connected to the telephone antenna for transmitting a call channel signal during a time when the radio telephone unit is in an ON-CALL MODE and a control channel signal during a time when the radio telephone unit is in an OFF-CALL MODE, said system comprising:
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monitor means for determining whether said radio telephone unit is in said ON-CALL MODE or said OFF-CALL MODE only when a signal level of the received GPS signal is less than a preselected value; and operation control means for setting said telephone transmitter circuit operative to transmit said call channel signal through said telephone antenna and for setting said GPS signal receiver circuit inoperative during a time when said radio telephone unit is in the ON-CALL MODE, wherein said operation control means selectively sets said telephone transmitter circuit operative to transmit said control channel signal through said telephone antenna during a time when said radio telephone unit is in the OFF-CALL MODE. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for controlling operations of a GPS receiver unit and a radio telephone unit, said GPS receiver unit including a GPS antenna for receiving a GPS signal and a GPS signal receiver circuit connected to the GPS antenna for processing the received GPS signal, said radio telephone unit including a telephone antenna and a telephone transmitter circuit connected to the telephone antenna for transmitting a call channel signal during a time when the radio telephone unit is in an ON-CALL MODE and a control channel signal during a time when the radio telephone unit is in an OFF-CALL MODE, said system comprising:
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monitor means for determining whether said radio telephone unit is in said ON-CALL MODE or said OFF-CALL MODE; and operation control means including first switching means operable between a first position which allows the received GPS signal to be fed to the telephone transmitter circuit therethrough and a second position which sets the telephone transmitter circuit operative, wherein said first switching means is retained in said first position when said radio telephone unit is in the OFF-CALL MODE to set said telephone transmitter circuit inoperative when said GPS signal is fed to said telephone transmitter circuit through said first switching means and operative when no GPS signal is fed thereto through said first switching means, and wherein said first switching means is retained in said second position when said radio telephone unit is in the ON-CALL MODE to set said telephone transmitter circuit operative and is set to said second position in the OFF-CALL MODE when the number of occurrences of the control channel signal transmitted through said telephone antenna becomes less than a predetermined value.
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Specification