Retransmission control method

Details Retransmission control method Retransmission control method

1997-07-17

1999-04-20

Grant, William

Excavating

371 34, 371 30, 371 33, 371 402, 371 4011, 370216, 39520065, 395 33, G08C 2502

Patent

active

058964029

ABSTRACT:
A highly efficient retransmission control method is achieved by preventing the order of data from being changed by one revolution of a modulo without adding extra overhead. The transmitting side continues to continuously transmit frames assigned frame numbers circulating by a modulo M to the receiving side. Upon detecting an error in the received frame, the receiving side returns a reject provided with the frame number of the frame. The transmitting side retransmits the frame to the receiving side in response to the reject. In a case where such retransmission control is carried out, the maximum number of times Nr a reject of the same frame is returnable is previously determined. The receiving side discontinues the return of the reject of the same frame until the number of times of the return exceeds the maximum number of times Nr. Consequently, the return of the reject of the same frame can be discontinued before the modulo of the frame number revolves once. As a result, it is possible to prevent the order of data from being changed by one revolution of the modulo.

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