COMMUNICATION METHODS EXECUTED BY AUXILIARY BASE STATION AND MAIN BASE STATION AND CORRESPONDING BASE STATIONS

摘要

Disclosed is a method for reporting a downlink data transmission status from an auxiliary base station to a main base station. The method comprises: the auxiliary base station sends a PDCP PDU coming from the main base station to a user device; the auxiliary base station sends a downlink data transmission status message to the main base station, the downlink data transmission status message comprising at least one serial number of a successfully sent PDCP PDU. Also disclosed is a method for a PDCP PDU to be discarded as soon as possible by a main base station, comprising: the main base station receives a downlink data transmission status message from an auxiliary base station, the downlink data transmission status message comprising at least one serial number of a successfully sent PDCP PDU; according to the downlink data transmission status message, the main base station discards a packet data convergence protocol protocol data unit (PDCP PDC) stored in the main base station. Also disclosed are a corresponding main base station and a corresponding auxiliary base station.