Method for data forwarding in a small cell system

A method for supporting a dual connectivity by a first base station in a mobile communication system, the method comprising:

• receiving, from a second base station, a request message including a data forwarding address of the second base station;
• and
• transmitting data to the second base station based on the data forwarding address of the second base station, the data being transmitted to a third base station at the second base station based on an address of the third base station,
• wherein the address of the third base station is transmitted from the third base station to the second base station.

A method for supporting a dual connectivity by a first base station in a mobile communication system, the method comprising:

• receiving, from a second base station, a request message for adding the first base station;
• transmitting, to the second base station, a response message including an address of the first base station;
• and
• receiving data from the second base station based on the address of the first base station, the data being transmitted from a third base station to the second base station based on a data forwarding address of the second base station,
• wherein the data forwarding address of the second base station is transmitted from the second base station to the third base station.

A first base station for supporting a dual connectivity in a mobile communication system, the base station comprising:

• a transceiver configured to transmit or receive signals;
• and
• a controller configured to control the transceiver to:
• transmit, to a second base station, a first request message for adding the second base station,
• receive, from the second base station, a response message including an address of the second base station,
• transmit, to third base station, a second request message including a data forwarding address of the first base station,
• receive, from the third base station, data based on the data forwarding address of the first base station, and
• forward, to the second base station, the data based on the address of the second base station.

A first base station for supporting a dual connectivity in a mobile communication system, the base station comprising:

• a transceiver configured to transmit or receive signals;
• and
• a controller configured to control the transceiver to:
• receive, from a second base station, a request message including a data forwarding address of the second base station, and
• transmit data to the second base station, the data being forwarded to a third base station at the second base station, the data being transmitted to a third base station at the second base station based on an address of the third base station,
• wherein the address of the third base station is transmitted from the third base station to the second base station.

A first base station for supporting a dual connectivity in a mobile communication system, comprising:

• a transceiver configured to transmit or receive signals;
• and
• a controller configured to control the transceiver to:
• receive, from a second base station, a request message for adding the first base station,
• transmit, to the second base station, a response message including an address of the first base station, and
• receive data from the second base station based on the address of the first base station, the data being transmitted from a third base station to the second base station based on a data forwarding address of the second base station,
• wherein the data forwarding address of the second base station is transmitted from the second base station to the third base station.