Patent ID: 9585133
Date: 2017-02-28
CPC Classifications: H04L,H04W

Claim:
1. A method of receiving a sounding reference signal (SRS) by a base station in a wireless communication system, the method comprising: transmitting, to a user equipment, 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; receiving, from the user equipment, the SRS on an uplink subframe via the specific CC indicated by the CIF when the SRS field is enabled; and transmitting, to the user equipment, a first medium access control (MAC) information including a bitmap in which a bit corresponding to the specific CC is disabled for deactivating the specific CC among the one or more second CCs, wherein an SRS transmission is not performed on the deactivated specific CC.