Component carrier (de) activation in communication systems using carrier aggregation

The present invention relates to a proposal of the active uplink or downlink component carrier (bi), which allows activation or deactivation of one or more component carriers in the message. In addition, the present invention relates to a new use of the active component carrier (bi) message in a method for the activation of the downlink component carriers configured for the mobile terminal (in), the base station and the mobile terminal. To enable the efficient robust (de) activation of the carrier component, the present invention is the component carrier (ratio) using a component carrier or a particular cell -RNTI for scrambling the CRC of the activation message, and the corresponding components in the field of the message It proposes that indicates the intended recipient of the carrier (de) activation message explicitly. In addition, the invention further proposes a different design and use of the prospective of the component carrier (de) activation message to trigger a CQI report and / or the SRS sent by the UE.