Error control system

TL;DR: In this paper, the authors proposed a method to perform error correction which allows information transmission requiring real-time processing by providing each of the transmission side and the reception side with a means which adds information for retransmission to each time slot and a retransmissions time limiting means which handles information retransmitted within a certain time out of erroneous information as an information signal.

Abstract: PURPOSE: To perform error correction which allows information transmission requiring real-time processing by providing each of the transmission side and the reception side with a means which adds information for retransmission to each time slot and a retransmission time limiting means which handles information retransmitted within a certain time out of erroneous information as an information signal. CONSTITUTION: In a transmitter 20, packets of plural information signals are collected to constitute each block by a control information adding circuit 2. A block identification number and a check bit for error detection are added to this block by the control information adding circuit 2. Signals led from the adding circuit 2 are temporarily stored in a buffer 3, and a signal having the requested block identification number is outputted to a signal synthesizer 4 when a retransmission request signal is received by a confirmation signal discriminating circuit 7. These signals are erased in the buffer 3 when a certain time elapses after input of signals from the adding circuit 2, and only signals retransmitted within the certain time are handled as information signals. In a receiver 20, it is discriminated by an error detecting circuit 10 whether signals received by a terminal 9 include error or not, and a confirmation signal generator 13 transmits the retransmission request signal to the transmitter 20 through a terminal 14 in accordance with the discrimination result. COPYRIGHT: (C)1989,JPO&Japio