Supporting carrier aggregation method and user equipment

The present invention provides a method of supporting carrier aggregation and the corresponding user equipment. According to the invention, the method includes determining a timing group from a cell sTAG advance from random access RA Scell ​​fail, the uplink UL transmit timing reference sTAG confusion; either stopped or suspended and the all sTAG UL on Scell ​​launch, either by taking appropriate measures to continue the UL on all Scell ​​sTAG of the launch.