The present invention relates to uplink signal transmission by a user equipment (UE) in terms of timing advance value in a wireless communication system. According to an embodiment of the invention, the UE applies a predetermined timing advance value for a TAG (Timing Advance Group) if the TAG includes only one or more first type cells. Here, a random access procedure is not supported on the first type cells. Based on it, the UE transmits the uplink signals to the network on one of the first type cells based on the timing advance value applied for the TAG.