A wireless device receives cross carrier scheduling parameter(s). A first control channel of a first cell carries downlink scheduling information for packets received via a downlink data channel of the first cell. A second control channel of a second cell carries uplink scheduling information for second packets transmitted via an uplink data channel of the first cell. A first DCI for uplink transmission is received via the first cell. A first deactivation timer of the first cell and a second deactivation timer of the second cell are started in response to the first DCI. A second DCI for downlink transmission is received via the first cell. The first deactivation timer and not the second deactivation timer is restarted in response to the second DCI. The first cell is deactivated in response to the first deactivation timer expiring. The second cell is deactivated in response to the second deactivation timer expiring.