Apparatus for electromagnetic communication between a computer and a non-contact IC card
First Claim
1. A reader/writer for communicating with and providing communication between an external host computer and a noncontact IC card comprising:
- input/output means electrically connected to an external host computer for inputting and outputting bidirectional signals to and from the external host computer;
control means electrically connected to said input/output means for controlling transmission of signals between the external host computer and a noncontact. IC card;
electromagnetic wave transmitter/receiver means electrically connected to said control means for transmitting to and receiving from the noncontact IC card bidirectional electromagnetic-wave signals, said control means determining whether a signal has been received from the external host computer through said input/output means and, if a signal has been received from the external host computer, determining whether the signal is a command or data and, if the signal is a command, executing the command and, if the signal is data, transferring the data to the noncontact IC card through said electromagnetic wave transmitter/receiver means and, if no signal has been received from the host computer, determining whether a signal has been received from the noncontact IC card through said electromagnetic wave transmitter/receiver means and, if a signal has been received from the noncontact IC card, transmitting the signal to the external host computer through said input/output means; and
means for communicating with the noncontact IC card at a first baud rate and for communicating with the external host computer at a second baud rate, the second baud rate being different from the first baud rate.
1 Assignment
0 Petitions
Accused Products
Abstract
A reader/writer includes an input/output unit for inputting and outputting bidirectional signals from and to an external host computer, a transmitter/receiver for transmitting to and receiving from a noncontact IC card bidirectional electromagnetic-wave signals, the controller being electrically connected to the input/output unit and transmitter/receiver for transferring signals between them. The reader/writer thus assists in transferring signals between an external host computer and a noncontact IC card. The operation of the reader/writer is so simple that communication between a noncontact IC card and an external host computer can be achieved efficiently. The software implemented in the reader/writer need not be modified but can still cope with various application programs running in the noncontact IC card and external host computer.
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Citations
11 Claims
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1. A reader/writer for communicating with and providing communication between an external host computer and a noncontact IC card comprising:
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input/output means electrically connected to an external host computer for inputting and outputting bidirectional signals to and from the external host computer; control means electrically connected to said input/output means for controlling transmission of signals between the external host computer and a noncontact. IC card; electromagnetic wave transmitter/receiver means electrically connected to said control means for transmitting to and receiving from the noncontact IC card bidirectional electromagnetic-wave signals, said control means determining whether a signal has been received from the external host computer through said input/output means and, if a signal has been received from the external host computer, determining whether the signal is a command or data and, if the signal is a command, executing the command and, if the signal is data, transferring the data to the noncontact IC card through said electromagnetic wave transmitter/receiver means and, if no signal has been received from the host computer, determining whether a signal has been received from the noncontact IC card through said electromagnetic wave transmitter/receiver means and, if a signal has been received from the noncontact IC card, transmitting the signal to the external host computer through said input/output means; and means for communicating with the noncontact IC card at a first baud rate and for communicating with the external host computer at a second baud rate, the second baud rate being different from the first baud rate. - View Dependent Claims (2, 3, 4, 5, 6, 11)
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7. A noncontact IC card system comprising:
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an external host computer; a noncontact IC card; and a reader/writer including; input/output means electrically connected to said external host computer for inputting and outputting bidirectional signals from and to said external host computer; control means electrically connected to said input/output means for controlling transmission of signals between said external host computer and said noncontact IC card; electromagnetic wave transmitter/receiver means electrically connected to said control means for transmitting to and receiving from said the noncontact IC card bidirectional electromagnetic-wave signals, said control means determining whether a signal has been received from said external host computer through said input/output means and, if a signal has been received from said external host computer, determining whether the signal is a command or data and, if the signal is a command, executing the command and, if the signal is data, transferring the data to said noncontact IC card through said electromagnetic wave transmitter/receiver means and, if no signal has been received, determining whether a signal has been received from said noncontact IC card through said electromagnetic wave transmitter/receiver means and, if a signal has been received from said noncontact IC card, transmitting the signal to said external host computer through said input/output means; and means for communicating with the noncontact IC card at a first baud rate and for communicating with the external host computer at a second baud rate, the second baud rate being different from the first baud rate. - View Dependent Claims (8, 9, 10)
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Specification