Method and apparatus for determining data transreceiving path in radio access system supporting multi-rat

A method of operation of network transmitting and receiving data with a terminal supporting a first radio access technology (RAT) and a second RAT, the method performed by a first base station and comprising:

• transmitting a first message including access information of a second base station which can be accessed through the second RAT to the terminal through the first RAT,
• wherein the terminal accesses the second base station based on the access information included in the first message;
• receiving a second message informing a result of accessing the second base station by the terminal,
• wherein the second message includes address information between the terminal and the second base station;
• and
• transmitting and receiving data with the terminal through the first RAT and the second RAT,
• wherein transmitting and receiving data with the terminal comprises:
• transmitting and receiving the data having a first flow ID through the first RAT, and
• transmitting and receiving the data having a second flow ID through the second RAT,
• wherein the data having the first flow ID and the data having the second flow ID are simultaneously transmitted and received,
• wherein the data having the second flow ID matches with the address information between the terminal and the second base station,
• wherein the second base station is a selected access point (AP) among a plurality of access points (APs), and
• wherein the terminal is a multi-RAT terminal that can simultaneously communicate the data with the first base station and the second bases station.

A terminal for transmitting and receiving data with a first base station supporting a first radio access technology (RAT) and a second base station supporting a second RAT in radio access system supporting multi radio access technology (RAT), the terminal comprising

• a radio communication unit configured to transmit and receive a radio signal with an external system;
• and
• a control unit connected to the radio communication unit, and configured to:
• receive a first message including access information for the second base station from the first base station;
• accessing the second base station based on the access information included in the first message;
• transmit a second message informing a result of the accessing the second base station by the terminal,
• wherein the second message includes address information between the terminal and the second base station;
• and
• transmit and receive data having a first flow identifier (ID) with the first base station through the first RAT, and transmit and receive data having a second flow ID with the second base station through the second RAT,
• wherein the data having the first flow ID and the data having the second flow ID are simultaneously transmitted and received between the terminal and the first/second base station,
• wherein the data having the second flow ID matches with the address information between the terminal and the second base station,
• wherein the second base station is a selected access point (AP) among a plurality of access points (APs), and
• wherein the terminal is a multi-RAT terminal that can simultaneously communicate the data with the first base station and the second bases station.