Method for transmitting and receiving data using WLAN carriers and apparatus thereof

A terminal for transmitting and receiving data, the terminal comprising:

• a receiver configured to receive configuration information for transmitting and receiving data to and from a base station by using an IPsec (Internet Protocol Security) tunnel through a WLAN (wireless local area network) carrier;
• a controller configured to configure the IPsec tunnel based on the configuration information and configured to set a data bearer by using the IPsec tunnel;
• and
• a transmitter configured to transmit data to the base station using the IPsec tunnel formed by a controller of the terminal,
• wherein the configuration information includes IP address information for the IPsec tunnel and IKE (Internet Key Exchange) configuration information;
• and
• wherein the controller is configured to perform encapsulation and decapsulation operations of the data that is transmitted and received through the IPsec tunnel between the terminal and the base station, where the performing of the encapsulation and decapsulation operations includes adding or removing bearer identification information to or from the data transmitted or received through the IPsec tunnel,
• wherein the controller of the terminal is configured to:
• receive a service data unit (SDU) from an IP layer;
• identify a core network interface bearer associated with the received SDU;
• add a tunnel header including the bearer identification information based on the identification result;
• and
• transfer the SDU having the tunnel header to a lower layer,
• wherein the core network interface bearer associated with the received SDU and the bearer identification information included in the tunnel header are separated from each other,
• wherein the core network interface bearer is EPS (Evolved Packet switched System) bearer,
• wherein the bearer identification information is data wireless bearer identification information (DRB-Identity),
• wherein the terminal is configured to:
• perform a mobility operation between WLAN Aps (WLAN Access Points) based on a WLAN mobility set information including identification information about one or more WLAN Aps received from the base station without informing the base station, and
• wherein the controller is configured to:
• receive a protocol data unit (PDU) from the base station through the IPsec tunnel;
• remove a tunnel header including bearer identification information from the PDU;
• and
• transfer removed bearer identification information PDU to the IP layer in the terminal.