Wireless communications method, apparatus, and system

A terminal, comprising:

• a processor, configured to set up a connection to a first base station, and thereafter stay-in an always-connected mode, wherein operation of the terminal within the always-connected mode is taken from the group consisting of:
• always keeping the connection to the first base station within a preset time range and not entering a conventional idle mode after completion of all service transmission;
• always keeping the connection to the first base station within a preset time range if no actual data transmission is performed;
• and
• always keeping the connection to the first base station within a preset time range if only a default bearer is set up but there is no actual data transmission;
• a receiver configured to cooperatively operate with the processor to receive a first dedicated signaling sent by the first base station, wherein the first dedicated signaling comprises a second base station list information, and the second base station list information comprises an information about each second base station having context information of the terminal;
• and
• a transmitter configured to cooperatively operate with the processor to perform a data transmission through at least one of the group consisting of:
• the first base station and a second base station that, according to the second base station list information, has the context information of the terminal.