| 摘要 |
PURPOSE:To quickly resend at the time of errors when an information frame is intermittently transmitted by resending from the information frame of transmitted sequence numbers when a frame, where the transmitted sequence number is a received sequence number, is received continuously twice. CONSTITUTION:When transmitting data are shifted to a transmitting buffer 1, a transmitting data preparation completion signal is given from the buffer 1 to a control circuit 6. The control circuit 6 adds and renews one transmitting number counter N(S) number, gives to the transmitting buffer together with an N(R) number and a F bit which are have already been obtained, and outputs a prescribed format frame to a transmitter 2. The transmitter 2 adds a frame check sequence (FCS) and transmits the frame to a circuit. On the other hand, error checking is executed by FCS for the frame which is inputted to a receiver 3, only the frame without errors is received and the data, etc., are transferred to a buffer 4. |
