Method for offloading traffic by means of wireless LAN in mobile communications system and apparatus therefor
The present invention relates to a method for offloading traffic by means of wireless LAN in a mobile communications system and apparatus therefor, and more particularly to a method for a terminal to offload traffic at a bearer level, and to a base station communicating with the terminal. The method for a terminal to offload traffic according to the present invention includes the steps of: while performing a data communication with a base station through a bearer of a first communications network, receiving from the base station an offloading command for offloading a part of traffic to a second communications network; transmitting a report of the offloading to the base station in response to the offloading command; and performing a data communication of the partial traffic with an accessible AP through a bearer of the second communications network without releasing the bearer of the first communications network.
1. A method performed by a user equipment (UE) in a wireless communication system, the method comprising:
receiving, from a base station, a UE capability enquiry message for requesting capability information of the UE, wherein the UE capability enquiry message includes information on a radio access technology (RAT) type;
transmitting, to the base station, a UE capability information message comprising information on a RAT type; and
receiving, from the base station, a radio resource control (RRC) reconfiguration message associated with a RRC reconfiguration procedure for adding or releasing at least one secondary cell,
wherein, in case that any number of secondary cell between one and 7 is added or released using the RRC reconfiguration message and a serving cell is in the same band as any of the secondary cell being added or released, an interruption on the serving cell of up to a duration is allowed for the UE during the RRC reconfiguration procedure, and
wherein the duration is determined based on a measurement duration.
2. The method of claim 1 , wherein the UE capability information message includes band combination for a carrier aggregation (CA).
3. The method of claim 1 , wherein the information on the RAT type comprises a value indicating the RAT type.
4. The method of claim 1 , wherein the measurement duration is associated with adding or releasing the at least one secondary cell.
5. A user equipment (UE) in a wireless communication system, the UE comprising:
a transmission/reception unit; and
a control unit coupled with the transmission/reception unit and configured to:
receive, from a base station, a UE capability enquiry message for requesting capability information of the UE, wherein the UE capability enquiry message includes information on a radio access technology (RAT) type,
transmit, to the base station, a UE capability information message comprising information on a RAT type, and
receive, from the base station, a radio resource control (RRC) reconfiguration message associated with a RRC reconfiguration procedure for adding or releasing at least one secondary cell,
wherein, in case that any number of secondary cell between one and 7 is added or released using the RRC reconfiguration message and a serving cell is in the same band as any of the secondary cell being added or released, an interruption on the serving cell of up to a duration is allowed for the UE during the RRC reconfiguration procedure, and
wherein the duration is determined based on a measurement duration.
6. The UE of claim 5 , wherein the UE capability information message includes band combination for a carrier aggregation (CA).
7. The UE of claim 5 , wherein the information on the RAT type comprises a value indicating the RAT type.
8. The UE of claim 5 , wherein the measurement duration is associated with adding or releasing the at least one secondary cell.
9. A method performed by a base station in a wireless communication system, the method comprising:
transmitting, to a user equipment (UE), a UE capability enquiry message for requesting capability information of the UE, wherein the UE capability enquiry message includes information on a radio access technology (RAT) type;
receiving, from the UE, a UE capability information message comprising information on a RAT type; and
transmitting, to the UE, a radio resource control (RRC) reconfiguration message associated with a RRC reconfiguration procedure for adding or releasing at least one secondary cell,
wherein, in case that any number of secondary cell between one and 7 is added or released using the RRC reconfiguration message and a serving cell is in the same band as any of the secondary cell being added or released, an interruption on the serving cell of up to a duration is allowed for the UE during the RRC reconfiguration procedure, and
wherein the duration is determined based on a measurement duration.
10. The method of claim 9 , wherein the UE capability information message includes band combination for a carrier aggregation (CA).
11. The method of claim 9 , wherein the information on the RAT type comprises a value the RAT type.
12. The method of claim 9 , wherein the measurement duration is associated with adding or releasing the at least one secondary cell.
13. A base station in a wireless communication system, the base station comprising:
a transmission/reception unit; and
a control unit coupled with the transmission/reception unit and configured to:
transmit, to a user equipment (UE), a UE capability enquiry message for requesting capability information of the UE, wherein the UE capability enquiry message includes information on a radio access technology (RAT) type,
receive, from the UE, a UE capability information message comprising information on a RAT type, and
transmit, to the base station, a message of radio resource control (RRC) reconfiguration message associated with a RRC reconfiguration procedure for adding or releasing at least one secondary cell,
wherein, in case that any number of secondary cell between one and 7 is added or released using the RRC reconfiguration message and a serving cell is in the same band as any of the secondary cell being added or released, an interruption on the serving cell of up to a duration is allowed for the UE during the RRC reconfiguration procedure, and
wherein the duration is determined based on a measurement duration.
14. The base station of claim 13 , wherein the UE capability information message includes band combination for a carrier aggregation (CA).
15. The base station of claim 13 , wherein the information on the RAT type comprises a value indicating the RAT type.
16. The base station of claim 13 , wherein the measurement duration is associated with adding or releasing the at least one secondary cell.