Apparatus and method for managing connections in wireless communication system

A method performed by a secondary base station in a wireless communication system, the method comprising:

• receiving, from a master base station, a first message for requesting the secondary base station to allocate resources for a dual connectivity (DC) operation;
• transmitting, to the master base station, a second message, after receiving the first message;
• and
• receiving, from the master base station, a third message, after transmitting the second message,
• wherein the first message comprises a quality of service (QoS) flow identifier (ID) and available data radio bearer (DRB) IDs,
• wherein the second message comprises the QoS flow ID and a DRB ID corresponding to the QoS flow ID, and
• wherein the third message comprises tunnel information for the DRB ID comprising an internet protocol (IP) address and a tunnel endpoint identifier (TEID).

A master base station in a wireless communication system, the master base station comprising:

• a transceiver;
• and
• at least one processor coupled to the transceiver,
• wherein the at least one processor is configured to:
• transmit, to a secondary base station, a first message for requesting the secondary base station to allocate resources for a dual connectivity (DC) operation;
• receive, from the secondary base station, a second message, after transmitting the first message;
• and
• transmit, to the secondary base station, a third message, after receiving the second message,
• wherein the first message comprises a quality of service (QoS) flow identifier (ID) and available data radio bearer (DRB) IDs,
• wherein the second message comprises the QoS flow ID and a DRB ID corresponding to the QoS flow ID, and
• wherein the third message comprises tunnel information for the DRB ID comprising an internet protocol (IP) address and a tunnel endpoint identifier (TEID).

A secondary base station in a wireless communication system, the secondary base station comprising:

• a transceiver;
• and
• at least one processor coupled to the transceiver,
• wherein the at least one processor is configured to:
• receive, from a master base station, a first message for requesting the secondary base station to allocate resources for a dual connectivity (DC) operation;
• transmit, to the master base station, a second message, after receiving the first message;
• and
• receive, from the master base station, a third message, after transmitting the second message,
• wherein the first message comprises a quality of service (QoS) flow identifier (ID) and available data radio bearer (DRB) IDs,
• wherein the second message comprises the QoS flow ID and a DRB ID corresponding to the QoS flow ID, and
• wherein the third message comprises tunnel information for the DRB ID comprising an internet protocol (IP) address and a tunnel endpoint identifier (TEID).