本發(fā)明涉及一種數(shù)據(jù)傳輸方法、裝置、網(wǎng)絡(luò)中繼設(shè)備及系統(tǒng)。其中,數(shù)據(jù)傳輸方法包括:數(shù)據(jù)發(fā)送端通過數(shù)據(jù)傳輸鏈路向數(shù)據(jù)接收端發(fā)送業(yè)務(wù)數(shù)據(jù)包;數(shù)據(jù)發(fā)送端在確定數(shù)據(jù)接收端未接收到業(yè)務(wù)數(shù)據(jù)包后,數(shù)據(jù)接收端向數(shù)據(jù)傳輸鏈路上的第一網(wǎng)絡(luò)中繼設(shè)備發(fā)送對應(yīng)于業(yè)...