Apparatus and method for providing multi-connection using different wireless connection technologies in wireless communication system
The present disclosure relates to a communication technique of fusing a 5G communication system for supporting higher data transmission rate beyond a 4G system with an IoT technology and a system thereof. The present disclosure may be applied to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety related service, or the like) based on the 5G communication technology and the IoT related technology. More specifically, a method of the present disclosure for providing multi-connection of a terminal using different radio access technologies in a wireless communication system comprises the steps of: transmitting/receiving data through a first bearer corresponding to a first communication; transmitting/receiving data through a second bearer corresponding to a second communication; receiving, from a base station, a radio resource control (RRC) message which directs reestablishment of the first bearer as the second bearer or reestablishment of the second bearer as the first bearer; and reestablishing the first bearer or the second bearer on the basis of the RRC message.
1. A method for providing a multi-connection by a user equipment (UE) using different radio access technologies in a wireless communication system, the method comprising:
receiving, from a base station, a radio resource control, RRC, control message instructing to reconfigure a first bearer to a second bearer or reconfigure the second bearer to the first bearer, wherein the first bearer is associated with a long term evolution, LTE, communication and the second bearer is associated with both the LTE communication and a wireless fidelity, WIFI, communication;
performing a packet data convergence protocol (PDCP) reordering if the first bearer is reconfigured to the second bearer based on the RRC control message; and
performing the PDCP reordering and transmitting a PDCP status report if the second bearer is reconfigured to the first bearer based on the RRC control message.
2. The method of claim 1 , further comprising:
establishing an RRC connection with the base station; and
reporting, to the base station, aggregation capability for the LTE and WIFI communications of the UE.
3. The method of claim 1 ,
wherein the first bearer is a bidirectional bearer in which both uplink transmission and downlink reception are performed,
wherein the downlink reception is performed through first and second layer devices of the LTE communication, and
wherein the uplink transmission is performed through the first and second layer devices of the LTE communication.
4. The method of claim 1 ,
wherein the second bearer is a bidirectional bearer in which both uplink transmission and downlink reception are performed,
wherein the downlink reception is performed through first and second layer devices of the LTE communication and first and second layer devices of the WIFI communication, and
wherein the uplink transmission is performed through the first and second layer devices of the LTE communication or the first and second layer devices of the WIFI communication.
5. The method of claim 1 , wherein the LTE communication and the WIFI communication use different frequency bands.
6. A user equipment (UE) for providing a multi-connection using different radio access technologies in a wireless communication system, the UE comprising:
a transceiver; and
a controller coupled with the transceiver and configured to control to:
receive, from a base station, a radio resource control (RRC) control message instructing to reconfigure a first bearer to a second bearer or reconfigure the second bearer to the first bearer, wherein the first bearer is associated with a long term evolution, LTE, communication and the second bearer is associated with both the LTE communication and a wireless fidelity, WIFI, communication,
perform a packet data convergence protocol (PDCP) reordering if the first bearer is reconfigured to the second bearer based on the RRC control message; and
perform the PDCP reordering and transmit a PDCP status report if the second bearer is reconfigured to the first bearer based on the RRC control message.
7. The UE of claim 6 , wherein the controller establishes an RRC connection with the base station and reports, to the base station, aggregation capability for the LTE and WIFI communications of the UE.
8. The UE of claim 6 ,
wherein the first bearer is a bidirectional bearer in which both uplink transmission and downlink reception are performed,
wherein the downlink reception is performed through first and second layer devices of the LTE communication, and
wherein the uplink transmission is performed through the first and second layer devices of the LTE communication.
9. The UE of claim 6 ,
wherein the second bearer is a bidirectional bearer in which both uplink transmission and downlink reception are performed,
wherein the downlink reception is performed through first and second layer devices of the LTE communication and first and second layer devices of the WIFI communication, and
wherein the uplink transmission is performed through the first and second layer devices of the LTE communication or the first and second layer devices of the WIFI communication.