Patent ID: 9467960
Filing Date: 2016-10-11
CPC Classification: H04L,H04W

Claim Text:
1. A method for wireless communication, comprising: identifying at least one secondary cell (S cell) belonging to a primary timing advance group (pTAG) and at least one Scell belonging to a secondary timing advance group (sTAG); selecting a first Scell among the at least one Scell within the sTAG as an uplink timing reference cell for the sTAG; receiving a downlink signal from a predetermined cell belonging to a pTAG and determining a downlink timing used as a reference for an uplink transmission timing for the pTAG; receiving a downlink signal from the first SCell and determining a downlink timing used as a reference for an uplink transmission timing for the sTAG; and performing an uplink transmission on a cell belonging to the sTAG using the uplink transmission timing for the sTAG.