Patent ID: 9722752
Date: 2017-08-01
CPC Classifications: H04L,H04W

Claim:
1. A method for receiving a sounding reference signal (SRS) in a wireless communication system, the method being performed by a base station that manages a plurality of serving cells including a time division duplex (TDD) cell and a frequency division duplex (FDD) cell, the method comprising: transmitting downlink control information to a user equipment at a first serving cell of the plurality of serving cells, the downlink control information including a carrier indicator and a downlink assignment, the carrier indicator indicating a second serving cell of the plurality of serving cells, the downlink assignment indicating a downlink resource assignment at the second serving cell; and when the downlink control information includes an aperiodic SRS request that indicates a triggering of an SRS transmission, receiving an SRS from the user equipment at the second serving cell, wherein: if the first serving cell is the FDD cell and the second serving cell is the TDD cell, the downlink control information includes the aperiodic SRS request, and if the first serving cell is the TDD cell and the second serving cell is the FDD cell, the downlink control information does not include the aperiodic SRS request.