Data communication apparatus
First Claim
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1. A data communication apparatus having an error correcting communication mode in half-duplex operation for communicating data, said apparatus comprising:
- a memory for storing received data, said memory having a capacity for storing data of not more than an amount of data to be transmitted in said error correcting communication mode;
declaring means for declaring that the error correcting communication is executable if a capacity of said memory is not more than an amount of data to be transmitted in said error correcting communication mode; and
means for detecting an overflow in said memory and presence of an error in the received data, and requesting that data be re-sent in accordance with the detection.
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Abstract
A data communication apparatus having an error correcting communication mode in half-duplex operation for communicating data and including a memory for storing received data. The memory has a capacity for storing data of not more than an amount of data to be transmitted in the error correcting communication mode. An overflow in the memory and presence of an error in the received data are detected, and data is requested to be re-sent in accordance with the detection result.
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Citations
37 Claims
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1. A data communication apparatus having an error correcting communication mode in half-duplex operation for communicating data, said apparatus comprising:
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a memory for storing received data, said memory having a capacity for storing data of not more than an amount of data to be transmitted in said error correcting communication mode; declaring means for declaring that the error correcting communication is executable if a capacity of said memory is not more than an amount of data to be transmitted in said error correcting communication mode; and means for detecting an overflow in said memory and presence of an error in the received data, and requesting that data be re-sent in accordance with the detection. - View Dependent Claims (2, 3, 4)
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5. A data communication apparatus having an error correcting communication mode for communicating data, said apparatus comprising:
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a memory for storing a data; declaring means for declaring that the error correcting communication is executable even if a capacity of said memory is not more than an amount of data to be transmitted in said error correcting communication mode; and control means for judging an unused capacity of said memory and for controlling a communication sequence of error correcting communication in accordance with a result of the judgment. - View Dependent Claims (6, 7, 8)
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9. A data communication apparatus having an error correcting communication mode in half-duplex operation for communicating data, comprising:
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a memory for storing data used for communicating data using said error correcting communication mode; declaring means for declaring that the error correcting communication is executable eyed if a capacity of said memory is not more than an amount of data to be transmitted in said error correcting communication mode; and control means for judging an unused capacity of said memory using the error correcting communication mode, and for controlling a data communication sequence of the error correcting communication mode in accordance with a result of the judgment. - View Dependent Claims (10, 11, 12, 13, 14, 15, 19)
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16. An error data detecting communication method using half-duplex operation for communicating data, comprising the steps of:
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declaring that the error correcting communication is executable even if a capacity of a memory used for error correcting communication is not more than an amount of data to be transmitted in an error correcting communication mode; judging an unused capacity of a memory which stores data used for error correcting communication by error correcting communication is performed; and controlling a communication sequence of the error correcting communication in accordance with a result of the judgment. - View Dependent Claims (17, 18)
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20. A data communication apparatus for performing error data correcting communication for a predetermined amount of data block by block, comprising:
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a memory for storing data to be used during error correcting communication; declaring means for declaring that the error correcting communication is executable even if a capacity of said memory is not more than an amount of data to be transmitted in said error correcting communication mode; and control means for judging whether or not an unused capacity of said memory is not less than the amount of one block of said data using the error correcting communication, and controlling a communication sequence of the error correcting communication in accordance with the result of the judgment. - View Dependent Claims (21, 22, 23, 24)
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25. A data communication method having an error correcting communication mode in half-duplex operation for communicating data, said method comprising the steps of:
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storing received data in a memory, the memory having a capacity of restoring data of not more than an amount of data to be transmitted in the error correcting communication mode; declaring that the error correcting communication is executable if a capacity of said memory is not more than an amount of data to be transmitted in said error correcting communication mode; and detecting an overflow in the memory and presence of an error in the received data, and requesting that data be re-sent in accordance with the detection. - View Dependent Claims (26, 27, 28)
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29. A data communication method having an error correcting communication mode for communicating data, said method comprising the steps of;
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storing data in a memory; declaring that the error correcting communication is executable even if a capacity of said memory is not more than an amount of data to be transmitted in said error correcting communication mode; and judging an unused capacity of the memory and controlling a communication sequence of error correcting communication in accordance with a result of the judgment. - View Dependent Claims (30, 31, 32)
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33. A data communication method for performing error data correcting communication for a predetermined amount of data block by block, comprising the steps of;
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storing data in a memory to be used during error correcting communication; declaring that the error correcting communication is executable even if a capacity of said memory is not more than an amount of data to be transmitted in said error correcting communication mode; and control means for judging whether or not an unused capacity of said memory is not less than the amount of said one block data using the error correcting communication, and controlling a communication sequence of the error correcting communication in accordance with the result of the judgement. - View Dependent Claims (34, 35, 36, 37)
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Specification