Data packet transmission device, data packet receiving apparatus, data packet retransmission control method and data packet transmission system

摘要

PROBLEM TO BE SOLVED: To reduce a useless retransmission even when the retransmission of data and a retransmission request pass each other between a transmitting station and a receiving station.;SOLUTION: When a status notice message (STATUS-PDU) is received from a receiving station 2, a transmitting station 1 judges the presence/absence of a retransmission control table and when there is the retransmission control table, the transmitting station refers to the relevant retransmission control table. When the upper limit value of sequence numbers contained in the status notice message is less than the upper limit value of sequence numbers contained in the retransmission control table, the difference of information on a data packet contained in the retransmission control table and the status notice message is extracted and necessity of retransmission is decided.;COPYRIGHT: (C)2003,JPO