Data transmission system and data transmission method
First Claim
Patent Images
1. A data transmission system comprising:
- an electric wire provided in a car;
a PLC modem connected with said electric wire; and
a terminal connected with said PLC modem;
wherein said terminal can communicate through said electric wire by using said PLC modem.
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Accused Products
Abstract
The present invention includes an electric wire laid in cars, a PLC modem connected with each electric wire and a terminal connected with each PLC modem. The terminal can communicate through the electric wire by using the PLC modem. When the cars are coupled with each other, the electric wires are electrically connected with each other and a new address is allocated to a control unit which has a unique address provided for each terminal.
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Citations
26 Claims
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1. A data transmission system comprising:
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an electric wire provided in a car;
a PLC modem connected with said electric wire; and
a terminal connected with said PLC modem;
wherein said terminal can communicate through said electric wire by using said PLC modem. - View Dependent Claims (2, 3, 4, 5)
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6. A data transmission system comprising:
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a line made of at least a single system of metal line provided in separated plural rooms;
two or more terminals of providing an image and audio information service for said rooms; and
a converting adapter connected between said line and said terminals;
wherein said converting adapter modulates data into digital signals as electronic signals, sends the digital signals through said line when said data is sent from said terminals; and
demodulates said digital signals and distributes said data to said terminals when said data is received. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. A data transmission system in a transporting vehicle comprising:
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a plurality of transmitting units; and
a plurality of receiving units corresponding to said plurality of transmitting units, respectively;
wherein a first communication between a transmitting unit and a receiving unit corresponding to said transmitting unit is performed by using a frequency different from that of a second communication and by at least partially using the same cable, the second communication being between another transmitting unit and a receiving unit corresponding to said other transmitting unit. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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23. A data transmission system comprising:
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a plurality of transmitting units;
a plurality of receiving units corresponding to said plurality of transmitting units respectively;
the same cable to which all of said plurality of transmitting units and said plurality of receiving units are connected;
a modem provided between a transmitting unit and said same cable; and
another modem provided between a receiving unit corresponding to said transmitting unit and said same cable; and
wherein a first communication between said transmitting unit and said receiving unit corresponding to said transmitting unit is performed by using frequency bands other than a plurality of discontinuous bands used for a second communication between an other transmitting unit and a receiving unit corresponding to said other transmitting unit. - View Dependent Claims (24)
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25. A data transmission method in a transporting vehicle,
wherein a first communication between a transmitting unit and a receiving unit corresponding to said transmitting unit is performed by using a frequency different from that of a second communication and by at least partially using the same cable, the second communication being between another transmitting unit and a receiving unit corresponding to said other transmitting unit.
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26. A data transmission method comprising:
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a plurality of transmitting units;
a plurality of receiving units corresponding to said plurality of transmitting units respectively;
the same cable to which all of said plurality of transmitting units and said plurality of receiving units are connected;
a modem provided between a transmitting unit and said same cable; and
another modem provided between a receiving unit corresponding to said transmitting unit and said same cable;
wherein a first communication between said transmitting unit and said receiving unit corresponding to said transmitting unit is performed by using frequency bands other than a plurality of discontinuous bands used for a second communication between another transmitting unit and the receiving unit corresponding to said other transmitting unit.
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Specification