Method and device for data communication
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United States of America Patent
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Jul 22, 1986
Grant Date -
N/A
app pub date -
Dec 28, 1982
filing date -
Jan 8, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for data communication usable for a system having a common transmission line, a plurality of transceivers connected to the common transmission line, and a data processing equipment connected to each of the transceivers, the system being arranged such that data from the data processing equipment is sent to the common transmission line through the corresponding transceiver, while data from the common transmission line is sent to the data processing equipment through the corresponding transceiver, thereby effecting a data communication between data processing equipment, wherein when a request to send data is sent from the data processing equipment to the corresponding transceiver, a carrier signal is sent to the common transmission line, and when the fact that no data is sent from any of the other transceivers to the common transmission line is detected during a given period of time after the sending of the carrier signal, the transceiver gives a permission to send data, to the corresponding data processing equipment, which then sends data on the permission. Also disclosed is a device for carrying out the above-mentioned method for data communication.
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