The technology presented in this disclosure pertains to telecommunication. For example, there is presented a method of operating a wireless terminal 30. A timing advance command (TAC) control element (CE) is received over a radio interface (from a network node 28). Upon receipt of the TAC CE, the method continues by updating UL (uplink) transmission timing for cells in a timing advance (TA) group even when a TA timer for the associated TA group is not running.