Patent ID: 6141785
Filing Date: 2000-10-31
Classification: H04L

Abstract:
An error control method in inter-multi-user multimedia communication comprising the steps of:a first step in which the receiver receives the data and heartbeat from the source, analyzes them and checks whether the error occurred to the data reception;a second step in which in case where the error occurred to the data reception as a result of check at first step, the receiver re-receives the data and heartbeat from the source, and in case where the error did not occur, the receiver checks whether it received the data packet outside the sequence number zone;a third step in which in case of having received the data packet inside the sequence number zone, as a result of check at second step the receiver shifts to the step for analyzing the data and heartbeat, and in case where the receiver received the data packet outside the sequence number zone, the receiver actuates the error correction mechanism;a fourth step in which in case where the receiver receives any message within the threshold for retransmission request from the source after actuation of said error correction mechanism, the receiver shifts to the step of analyzing the received data and heartbeat, and in case where the receiver did not receive anything, the receiver sends the query message to the multicast group to query the status of source; anda fifth step in which the source transmits the heartbeat to respond to the query, and in case where there is an error in the data packet received from the source, the receiver shifts to the step of receiving the data and heartbeat from the source, and in case where there is no more error to the data packet, the procedure in terminated.