| 主权项 |
1. A method of transmitting a sounding reference signal (SRS) by a user equipment in a wireless communication system, the method comprising:
receiving, from a base station, a physical downlink control channel (PDCCH) including a carrier indicator field (CIF) and an SRS field via a first component carrier (CC) among a plurality of CCs including the first CC and one or more second CCs, the CIF indicating a specific CC of the one or more second CCs and the SRS field indicating whether the user equipment has to transmit the SRS via the specific CC indicated by the CIF; transmitting, to the base station, the SRS on an uplink subframe via the specific CC indicated by the CIF based on SRS configuration information if the SRS field is enabled; and receiving, from the base station, a first medium access control (MAC) information for deactivating the one or more second CCs other than the first CC, the first MAC information including a bitmap for indicating whether the one or more second CCs are to be deactivated, wherein if a bit for the specific CC in the bitmap has been disabled, the specific CC and SRS transmission on the specific CC are deactivated. |
