METHOD AND APPARATUS FOR TRANSMITTING DATA THROUGH INTER-ENB CARRIER AGGREGATION IN WIRELESS COMMUNICATION SYSTEM

摘要

The present invention relates to a method and an apparatus for transmitting data to user equipment through not only a current base station cell but also a neighboring base station cell via inter-eNB CA in a wireless communication system. A method for transmitting data though carrier aggregation in the wireless communication system, according to the present invention, comprises the steps of: a first base station transreceiving data with a terminal through at least two PDN connections; the first base station transmitting a carrier aggregation request message to a second base station for aggregating carriers, when the first base station determines to carry out inter-eNB carrier aggregation; the first base station receiving a carrier aggregation reply message from the second base station in response to the carrier aggregation request message; the first base station performing an RRC reconfiguration process with the terminal to notify to the terminal of the determination to perform the inter-eNB carrier aggregation; and the first base station transmitting a path change request message to a mobile management entity to correct a data transreceiving path, so that data on at least one PDN connection from among the PDN connections is transreceived through the second base station.

主权项

1. A data transmission method using carrier aggregation in a wireless communication system, the method comprising:
communicating, at a first base station, data with a terminal through at least two Packet Data Network (PDN) connections; transmitting, when the first base station determines to perform inter-base station carrier aggregation, a carrier aggregation request message to a second base station participating in the carrier aggregation; receiving, at the first base station, a carrier aggregation response message from the second eNB in response to the carrier aggregation request message; notifying, at the first base station, the terminal of the determination of performing the inter-base station carrier aggregation through an RRC reconfiguration procedure with the terminal; and transmitting, at the first base station, a path switch request message to a mobility management entity, to modify the data transmission path in order to deliver the data on at least one of the PDN connection via the second eNB.