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

摘要

This invention relates to the proposal of component carrier (de)activation message that is allowing a activation or deactivation of one or more component carriers in the uplink or downlink. Furthermore, the invention relates to the use of the new component carrier (de)activation message in methods for (de)activation of downlink component carrier(s) configured for a mobile terminal, a base station and a mobile terminal. To enable efficient and robust (de)activation of component carriers, the invention proposes to use component carrier-specific or cell-RNTI(s) for the scrambling of the CRC of the component carrier (de)activation message, and to explicitly indicate the intended recipient of the component carrier (de)activation message in a corresponding field in the message. Furthermore, the invention further proposes different designs of the component carrier (de)activation message and further uses thereof, so as to trigger CQI reporting and/or SRS transmission by a mobile terminal.

主权项

1. A communication method comprising:
receiving a MAC control element including a cluster of bits which indicates an activation/deactivation status of each of at least one secondary component carrier that is added to a primary component carrier which is always activated, each of the at least one secondary component carrier corresponding to one bit included in the cluster of bits, and the one bit indicating that a corresponding secondary component carrier should be activated or deactivated, wherein when any one bit among the cluster of bits indicates that its corresponding secondary component carrier should be activated, the cluster of bits further indicates a sounding reference signal (SRS) transmission request; activating or deactivating each of the at least one secondary component carrier according to the received MAC control element; and starting an SRS transmission on the activated secondary component carrier(s).