Control method for supporting multiple connections in mobile communication system and apparatus for supporting multiple connections

A method for supporting a multiple connectivity using two or more base stations, performed by a second base station, the method comprising:

• receiving a multiple connectivity configuration request message from a first base station;
• transmitting a response message for the multiple connectivity configuration request message to the first base station;
• and
• performing a random access procedure with a terminal having completed configuration of the multiple connectivity according to a multiple connectivity configuration command message received from the first base station,
• wherein the multiple connectivity configuration request message includes at least one of radio resource allocation information for the terminal including semi-persistent scheduling (SPS) configuration information, discontinuous reception (DRX) configuration information and bearer property information, information on the terminal, measurement results from the terminal, and measurement configuration parameters.

A method for supporting a multiple connectivity using two or more base stations, performed by a terminal, the method comprising:

• receiving a multiple connectivity configuration command message from a first base station;
• transmitting a multiple connectivity configuration completion message to the first base station;
• and
• performing a random access procedure with the second base station,
• wherein the multiple connectivity configuration command message is transmitted by the first base station to the terminal after the first base station transmits a multiple connectivity configuration request message to the second base station, and receives a response message for the multiple connectivity configuration request message from the second base station,
• wherein the multiple connectivity configuration request message includes at least one of radio resource allocation information for the terminal including semi-persistent scheduling (SPS) configuration information, discontinuous reception (DRX) configuration information and bearer property information, information on the terminal, measurement results from the terminal, and measurement configuration parameters.