Method for reconfiguring wireless bearer and device thereof

A method of reconfiguring a radio bearer by a user equipment, the method comprising:

• receiving a higher layer signal including information for changing a data radio bearer type of one selected radio bearer configured to receive downlink data from a base station using only wireless resources of the base station;
• and
• starting, by a packet data convergence protocol (PDCP) entity, a reordering procedure for the one selected radio bearer based on the information for changing the data radio bearer type of the one selected radio bearer,
• wherein the information for changing the data radio bearer type of the one selected radio bearer includes information for changing the one selected radio bearer from a first radio bearer type receiving the downlink data using only the wireless resources of the base station to a second radio bearer type receiving the downlink data using only wireless local area network (WLAN) wireless resources and maintaining radio bearer types of the other radio bearers configured to receive downlink data and to transmit uplink data using one of the WLAN wireless resources and the wireless resources of the base station;
• and
• wherein the reordering procedure is performed by the PDCP entity when the data radio bearer type is changed from the first radio bearer type to the second radio bearer type based on the information for changing the data radio bearer type.

A method of reconfiguring a radio bearer of a user equipment by a base station, the method comprising:

• transmitting, to the user equipment, a higher layer signal including information for changing a data radio bearer type of one selected radio bearer configured to receive downlink data using only wireless local area network (WLAN) wireless resources;
• receiving a PDCP status report from the user equipment;
• and
• retransmitting, by a packet data convergence protocol (PDCP) entity, PDCP protocol data units or PDCP service data units based on the PDCP status report wherein the PDCP protocol data unit or the PDCP service data units are data units not confirmed as successfully delivered,
• wherein the information for changing the data radio bearer type of the one selected radio bearer includes information for changing the one selected radio bearer from a first radio bearer type receiving the downlink data using only the WLAN wireless resources to a second radio bearer type receiving the downlink data using only wireless resources of the base station and maintaining radio bearer types of the other radio bearers configured to receive downlink data and to transmit uplink data using one of the WLAN wireless resources and the wireless resources of the base station;
• and
• wherein the user equipment is configured to perform, by a PDCP entity, a reordering procedure for the one selected radio bearer when the data radio bearer type is changed from the first radio bearer type to the second radio bearer type based on the information for changing the data radio bearer type.