Communication system for packet data communication, control system for packet data communication and communication device for packet data communication
AssigneeKowa Company, Ltd.
InventorsTomohisa Azegami, Kenichi Namiki
Life of this patent
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Abstract
A first communication unit 11 repeatedly transmits the same data signal as a transmitted data signal to a second communication unit 23 at shorter time intervals than an acknowledgement time in which an ACK signal is returned from the second communication unit 23 without any failure. As a result, even when the transmitted data signal is garbled in the middle of a transmission path due to noise, the second communication unit 23 can rapidly receive the repeatedly transmitted same data signal.
Claims20
A communication system for performing packet data communication between a first communication unit and a second communication unit, wherein
- the first communication unit is configured to transmit a data signal to the second communication unit with an identification code being included in the data signal,
- the second communication unit is configured to return an ACK signal including the same identification code as an identification code included in a received data signal to the first communication unit,
- the first communication unit repeatedly transmits the transmitted data signal to the second communication unit at a time interval shorter than a preset failure determination time, and
- the failure determination time is longer than a time in which the ACK signal is returned from the second communication unit without any failure.
A communication system for performing packet data communication between a first communication unit and a plurality of second communication units via an intermediate communication unit, wherein
- the first communication unit includes an identification code in a data signal and then transmits the data signal to the intermediate communication unit,
- the intermediate communication unit distributes and transfers the received data signal to the second communication unit or another intermediate communication unit,
- the intermediate communication unit and the second communication unit are configured to return an ACK signal including the same identification code as the identification code included in the received data signal to a transmission source of the data signal,
- the first communication unit repeatedly transmits the transmitted data signal at a time interval shorter than a preset failure determination time,
- the intermediate communication unit likewise repeatedly transfers the transferred data signal at a time interval shorter than the preset failure determination time, and
- the failure determination time is longer than a time in which the ACK signal is returned without any failure from each of the intermediate communication unit and the second communication unit.
Dependencies are inferred from the claim text.