| 摘要 |
A method for retransmitting data from a base station of a first communication system in a network in which a plurality of communication systems are linked, according to the present invention, may comprise the steps of: transmitting, to a base station of a second communication system, information related to downlink data to be transmitted using a radio access level-split bearer to transreceive data between the base station of the first communication system and the base station of the second communication system; receiving, from the base station of the second communication system, a confirmation response to an indication, when the information related to the downlink data to be transmitted using the radio access level-split bearer indicates carrying out retransmission from the base station of the first communication system; transmitting the downlink data to the base station of the second communication system based on the confirmation response; and retransmitting the downlink data to a terminal when a specific condition is satisfied. |
