Communication apparatus for vehicle
First Claim
1. A communication apparatus for a vehicle comprising:
- at least one ID transmitter that is installed on a vehicle and sends a transmitter ID possessed by itself in response to reception of a radio wave;
an on-board unit that is installed on said vehicle and radiates said radio wave to said ID transmitter;
a portable unit that receives said transmitter ID sent by said ID transmitter; and
an ID communication section that sends said transmitter ID from said portable unit to said on-board unit;
wherein said on-board unit determines the position of said portable unit based on said transmitter ID received from said portable unit.
1 Assignment
0 Petitions
Accused Products
Abstract
A communication apparatus for a vehicle can achieve an inexpensive technique for determining whether a portable unit exists inside or outside the vehicle without depending upon LF band radio waves through contactless communication using high frequency band radio waves by separating a reader function of a reader/writer into the portable unit and an on-board unit. The apparatus includes at least one ID transmitter installed on a vehicle and sends a transmitter ID possessed by itself in response to reception of a radio wave, an on-board unit installed on the vehicle for radiating a radio wave to the ID transmitter, a portable unit that receives the transmitter ID sent by the ID transmitter, and an ID communication section for sending the transmitter ID from the portable unit 3 to the on-board unit. The on-board unit determines the position of the portable unit based on the transmitter ID received from the portable unit.
27 Citations
29 Claims
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1. A communication apparatus for a vehicle comprising:
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at least one ID transmitter that is installed on a vehicle and sends a transmitter ID possessed by itself in response to reception of a radio wave;
an on-board unit that is installed on said vehicle and radiates said radio wave to said ID transmitter;
a portable unit that receives said transmitter ID sent by said ID transmitter; and
an ID communication section that sends said transmitter ID from said portable unit to said on-board unit;
wherein said on-board unit determines the position of said portable unit based on said transmitter ID received from said portable unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communication apparatus for a vehicle comprising:
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at least one ID transmitter that is installed on a vehicle and sends a transmitter ID possessed by itself in response to reception of a radio wave;
an on-board unit installed on said vehicle;
a portable unit that radiates a radio wave to said ID transmitter and receives a transmitter ID generated by said ID transmitter; and
an ID communication section that sends said transmitter ID from said portable unit to said on-board unit;
wherein said on-board unit determines the position of said portable unit based on said transmitter ID received from said portable unit. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A communication apparatus for a vehicle comprising:
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at least one ID transmitter that is installed on a vehicle and sends a transmitter ID possessed by itself in response to reception of a radio wave;
a portable unit that radiates a radio wave to said ID transmitter; and
an on-board unit that is installed on said vehicle and receives said transmitter ID generated by said ID transmitter;
wherein said on-board unit determines the position of said portable unit based on said transmitter ID received from said ID transmitter. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29)
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Specification