METHOD FOR INITIATING A RANDOM ACCESS PROCEDURE IN A CARRIER AGGREGATION SYSTEM AND A DEVICE THEREFOR

摘要

The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for initiating a random access procedure in a carrier aggregation system, the method comprising: receiving, from a network, a Radio Resource Control (RRC) signal which configures a Physical Uplink Control Channel (PUCCH) resource for a Secondary Cell (SCell) in a Timing Advance Group (TAG); and initiating random access procedure on the SCell with the PUCCH resource to be configured by the RRC signal if there is no cell with PUCCH resource other than the SCell in the TAG.